US4435501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled site epitaxial sensitization
Assignee: Eastman Kodak Co
•
Filing: 1982-09-30
•
Granted: 1984-03-06
•
Expires: 2002-09-30
Abstract
Abstract High aspect ratio tabular grain silver halide emulsions, photographic elements incorporating these emulsions, and processes for the use of the photographic elements are disclosed. In the tabular grain emulsions the silver halide grains having a thickness of less than 0.5 micron (preferably less than 0.3 micron) and a diameter of at least 0.6 micron have a high aspect ratio and account for at least 50 percent of the total projected area of the silver halide grains present. Silver salt is epitaxially located on and substantially confined to selected surface sites of the tabular silver halide grains.
Inventors
- 👤 Joe E. Maskasky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/0051
Claims Analysis
Total Claims: 126
Claim 1
Independent Claim
93 words
A tabular grain silver halide emulsion comprised of a dispersing medium and silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.3 micron, a diameter of a least 0.6 micron, and an average aspect ratio of greater than 8:1, said tabular silver halide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver salt epitaxially located on and substantially confined to selected surface sites of said tabular grains.
Claim 2
Dependent Claim
93 words
A tabular grain silver halide emulsion comprised of a dispersing medium and silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.3 micron, a diameter of a least 0.6 micron, and an average aspect ratio of greater than 8:1, said tabular silver halide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver salt epitaxially located on and substantially confined to selected surface sites of said tabular grains.
Claim 3
Dependent Claim
17 words
A silver halide emulsion according to claim 1 wherein the average aspect ratio is at least 12:1.
Claim 4
Dependent Claim
17 words
A silver halide emulsion according to claim 1 wherein the average aspect ratio is at least 20:1.
Claim 5
Dependent Claim
15 words
A silver halide emulsion according to claim 1 wherein the dispersing medium is a peptizer.
Claim 6
Dependent Claim
17 words
A silver halide emulsion according to claim 2 wherein the peptizer is gelatin or a gelatin derivative.
Claim 7
Dependent Claim
30 words
A silver halide emulsion according to claim 2 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 8
Dependent Claim
30 words
A silver halide emulsion according to claim 6 wherein the tabular silver halide grains account for at least 90 percent of the total projected area of said silver halide grains.
Claim 9
Dependent Claim
18 words
A silver halide emulsion according to claim 1 wherein the tabular silver halide grains are comprised of bromide.
Claim 10
Dependent Claim
19 words
A silver halide emulsion according to claim 8 wherein the tabular silver halide grains are additionally comprised of iodide.
Claim 11
Dependent Claim
18 words
A silver halide emulsion according to claim 1 wherein the tabular silver halide grains are comprised of chloride.
Claim 12
Dependent Claim
15 words
A silver halide emulsion according to claim 1 wherein the silver salt is silver halide.
Claim 13
Dependent Claim
16 words
A silver halide emulsion according to claim 11 wherein the silver salt is comprised of bromide.
Claim 14
Dependent Claim
16 words
A silver halide emulsion according to claim 11 wherein the silver salt is comprised of chloride.
Claim 15
Dependent Claim
15 words
A silver halide emulsion according to claim 1 wherein the silver salt is silver thiocyanate.
Claim 16
Dependent Claim
20 words
A silver halide emulsion according to claim 1 wherein a site director is adsorbed to the tabular silver halide grains.
Claim 17
Dependent Claim
17 words
A silver halide emulsion according to claim 15 wherein the site director is a spectral sensitizing dye.
Claim 18
Dependent Claim
25 words
A silver halide emulsion according to claim 16 wherein the spectral sensitizing dye is adsorbed to the tabular silver halide grains in an aggregated form.
Claim 19
Dependent Claim
28 words
A silver halide emulsion according to claim 1 wherein at least one of the silver salt and the tabular silver halide grains contains a sensitivity modifier incorported therein.
Claim 20
Dependent Claim
29 words
A silver halide emulsion according to claim 1 wherein the silver salt is epitaxially located on less than half of the surface area provided by the major crystal faces.
Claim 21
Dependent Claim
30 words
A silver halide emulsion according to claim 19 wherein the silver salt is epitaxially located on less than 25 percent of the surface area provided by the major crystal faces.
Claim 22
Dependent Claim
30 words
A silver halide emulsion according to claim 20 wherein the silver salt is epitaxially located on less than 10 percent of the surface area provided by the major crystal faces.
Claim 23
Dependent Claim
24 words
A silver halide emulsion according to claim 1 wherein the silver salt is substantially confined to edge sites on the tabular silver halide grains.
Claim 24
Dependent Claim
27 words
A silver halide emulsion according to claim 1 wherein the silver salt is substantially confined to one or more corner sites on the tabular silver halide grains.
Claim 25
Dependent Claim
128 words
A tabular grain silver halide emulsion comprised of gelatin or a gelatin derivative, silver halide grains, wherein at least 70 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio of at least 12:1, said tabular silver halide grains being bounded by opposed, substantially parallel hexagonal or triangular major crystal faces, at least one of silver halide and silver thiocyanate epitaxially located on and substantially confined to selected surface sites of said tabular grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver halide or silver thiocyanate.
Claim 26
Dependent Claim
128 words
A tabular grain silver halide emulsion comprised of gelatin or a gelatin derivative, silver halide grains, wherein at least 70 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio of at least 12:1, said tabular silver halide grains being bounded by opposed, substantially parallel hexagonal or triangular major crystal faces, at least one of silver halide and silver thiocyanate epitaxially located on and substantially confined to selected surface sites of said tabular grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver halide or silver thiocyanate.
Claim 27
Dependent Claim
40 words
A tabular grain silver halide emulsion according to claim 24 wherein the spectral sensitizing dye is present in a concentration sufficient to provide monomolecular coverage of at least 15 percent of the surface area of said tabular silver halide grains.
Claim 28
Dependent Claim
40 words
A tabular grain silver halide emulsion according to claim 25 wherein the spectral sensitizing dye is present in a concentration sufficient to provide monomolecular coverage of at least 70 percent of the surface area of said tabular silver halide grains.
Claim 29
Dependent Claim
22 words
A tabular grain silver halide emulsion according to claim 24 wherein the spectral sensitizing dye is an aggregating cyanine or merocyanine dye.
Claim 30
Dependent Claim
41 words
A tabular grain silver halide emulsion according to claim 27 wherein the spectral sensitizing dye is an aggregating cyanine dye containing at least one nucleus chosen from the group consisting of quinolinium, benzoxazolium, benzothiazolium, benzoselenazolium, benzimidazolium, naphthoxazolium, naphthothiazolium and naphthoselenazolium nuclei.
Claim 31
Dependent Claim
41 words
A tabular grain silver halide emulsion according to claim 28 wherein the spectral sensitizing dye is chosen from the group consisting of anhydro-9-ethyl-3,3'-bis(3-sulfopropyl)-4,5,4',5'-dibenzothiacarbocyanine hydroxide, anhydro-5,5'-dichloro-9-ethyl-3,3'-bis(3-sulfobutyl)thiacarbocyanine hydroxide, anhydro-5,5',6,6'-tetrachloro-1,1'-diethyl-3,3'-bis(3-sulfobutyl)benzimidazolocarbocyanine hydroxide, anhydro-5,5',6,6'-tetrachloro-1,1',3-triethyl-3'-(3-sulfobutyl)benzimidazolocarbocyanine hydroxide, anhydro-5-chloro-3,9-diethyl-5'-phenyl-3'-(3-sulfopropyl)oxacarbocyanine hydroxide, anhydro-5-chloro-3',9-diethyl-5'-phenyl-3-(3-sulfopropyl)oxacarbocyanine hydroxide, anhydro-5-chloro-9-ethyl-5'-phenyl-3,3'-bis(3-sulfopropyl)oxacarbocyanine hydroxide, anhydro-9-ethyl-5,5'-diphenyl-3,3'-bis(3-sulfobutyl)oxacarbocyanine hydroxide, anhydro-5,5'-dichloro-3,3'-bis(3-sulfopropyl)thiacyanine hydroxide, and
Claim 32
Dependent Claim
2 words
1'-diethyl-2,2'-cyanine p-toluenesulfonate.
Claim 33
Dependent Claim
2 words
1'-diethyl-2,2'-cyanine p-toluenesulfonate.
Claim 34
Dependent Claim
103 words
A tabular grain silver halide emulsion comprised of gelatin or a gelatin derivative, silver halide grains, wherein at least 70 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio of at least 12:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, and at least one of silver halide and silver thiocyanate epitaxially located on and substantially confined to selected surface sites on said tabular silver bromoiodide grains.
Claim 35
Dependent Claim
103 words
A tabular grain silver halide emulsion comprised of gelatin or a gelatin derivative, silver halide grains, wherein at least 70 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio of at least 12:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, and at least one of silver halide and silver thiocyanate epitaxially located on and substantially confined to selected surface sites on said tabular silver bromoiodide grains.
Claim 36
Dependent Claim
39 words
A tabular grain silver halide emulsion according to claim 30 wherein at least one silver halide containing a sensitivity modifier incorporated therein is epitaxially located on and substantially confined to selected surface sites on said tabular silver bromoiodide grains.
Claim 37
Dependent Claim
24 words
A tabular grain silver halide emulsion according to claim 31 wherein said sensitivity modifier provides electron trapping sites in the epitaxially located silver halide.
Claim 38
Dependent Claim
20 words
A tabular grain silver halide emulsion according to claim 30 wherein the sensitivity modifier is a Group VIII noble metal.
Claim 39
Dependent Claim
29 words
A tabular grain silver halide emulsion according to claim 31 wherein said tabular grain silver halide emulsion is chemically sensitized with at least one of sulfur, selenium and gold.
Claim 40
Dependent Claim
94 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver thiocyanate epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromoiodide grains.
Claim 41
Dependent Claim
94 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver thiocyanate epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromoiodide grains.
Claim 42
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 35 wherein the average aspect ratio is at least 12:1.
Claim 43
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 35 wherein the average aspect ratio is at least 20:1.
Claim 44
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 35 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 45
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 35 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 46
Dependent Claim
94 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver chloride epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromoiodide grains.
Claim 47
Dependent Claim
94 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver chloride epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromoiodide grains.
Claim 48
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 40 wherein the average aspect ratio is at least 12:1.
Claim 49
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 40 wherein the average aspect ratio is at least 20:1.
Claim 50
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 40 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 51
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 40 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 52
Dependent Claim
116 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, silver bromide epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromoiodide grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver bromide.
Claim 53
Dependent Claim
116 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, silver bromide epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromoiodide grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver bromide.
Claim 54
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 45 wherein the average aspect ratio is at least 12:1.
Claim 55
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 45 wherein the average aspect ratio is at least 20:1.
Claim 56
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 45 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 57
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 45 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 58
Dependent Claim
145 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, said tabular silver bromoiodide grains containing less than 5 mole percent iodide in a central region and at least 8 mole percent iodide in a laterally surrounding annular region, said central region forming a preferred site for sensitization on each of said major crystal faces of said tabular silver bromoiodide grains, and silver chloride epitaxially located on and substantially confined to the preferred sensitization sites on said tabular silver bromoiodide grains.
Claim 59
Dependent Claim
145 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromoiodide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromoiodide grains being bounded by opposed, substantially parallel {111} major crystal faces, said tabular silver bromoiodide grains containing less than 5 mole percent iodide in a central region and at least 8 mole percent iodide in a laterally surrounding annular region, said central region forming a preferred site for sensitization on each of said major crystal faces of said tabular silver bromoiodide grains, and silver chloride epitaxially located on and substantially confined to the preferred sensitization sites on said tabular silver bromoiodide grains.
Claim 60
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 50 wherein the average aspect ratio is at least 12:1.
Claim 61
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 50 wherein the average aspect ratio is at least 20:1.
Claim 62
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 50 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 63
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 50 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 64
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 50 wherein the annular region is comprised of at least 12 mole percent iodide.
Claim 65
Dependent Claim
27 words
A tabular grain silver halide emulsion according to claim 50 wherein no more than one crystal of silver chloride is epitaxially located at each major crystal face.
Claim 66
Dependent Claim
22 words
A tabular grain silver halide emulsion according to claim 50 wherein the silver chloride contains at least one sensitivity modifier incorporated therein.
Claim 67
Dependent Claim
20 words
A tabular grain silver halide emulsion according to claim 57 wherein the sensitivity modifier is a Group VIII noble metal.
Claim 68
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 57 wherein the sensitivity modifier is at least one of sulfur, selenium and gold.
Claim 69
Dependent Claim
116 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromide grains being bounded by opposed, substantially parallel {111} major crystal faces, silver chloride epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromide grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver chloride.
Claim 70
Dependent Claim
116 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromide grains being bounded by opposed, substantially parallel {111} major crystal faces, silver chloride epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromide grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver chloride.
Claim 71
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 60 wherein the average aspect ratio is at least 12:1.
Claim 72
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 60 wherein the average aspect ratio is at least 20:1.
Claim 73
Dependent Claim
21 words
A tabular grain silver halide emulsion according to claim 60 wherein the dispersing medium comprises gelatin or a gelatin derivative peptizer.
Claim 74
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 60 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 75
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 60 wherein the tabular silver halide grains account for at least 90 percent of the total projected area of said silver halide grains.
Claim 76
Dependent Claim
92 words
A tabular grain silver halide emulsion comprised of a disersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver thiocyanate epitaxially located on and substantially confined to edge sites of the tabular silver bromide grains.
Claim 77
Dependent Claim
92 words
A tabular grain silver halide emulsion comprised of a disersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver thiocyanate epitaxially located on and substantially confined to edge sites of the tabular silver bromide grains.
Claim 78
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 66 wherein the average aspect ratio is at least 12:1.
Claim 79
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 66 wherein the average aspect ratio is at least 20:1.
Claim 80
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 66 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 81
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 66 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 82
Dependent Claim
116 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromide grains being bounded by opposed, substantially parallel {111} major crystal faces, silver thiocyanate epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromide grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver thiocyanate.
Claim 83
Dependent Claim
116 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver bromide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver bromide grains being bounded by opposed, substantially parallel {111} major crystal faces, silver thiocyanate epitaxially located on and substantially confined to edge or corner sites of the tabular silver bromide grains, and an aggregating spectral sensitizing dye adsorbed to at least those portions of the major crystal faces free of epitaxially located silver thiocyanate.
Claim 84
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 71 wherein the average aspect ratio is at least 12:1.
Claim 85
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 71 wherein the average aspect ratio is at least 20:1.
Claim 86
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 71 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 87
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 71 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 88
Dependent Claim
92 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver chloride grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver chloride grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver thiocyanate epitaxially located on and substantially confined to edge sites of the tabular silver chloride grains.
Claim 89
Dependent Claim
92 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver chloride grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver chloride grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver thiocyanate epitaxially located on and substantially confined to edge sites of the tabular silver chloride grains.
Claim 90
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 76 wherein the average aspect ratio is at least 12:1.
Claim 91
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 76 wherein the average aspect ratio is at least 20:1.
Claim 92
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 76 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 93
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 76 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 94
Dependent Claim
113 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver grains being bounded by opposed, substantially parallel {111} major crystal faces, said silver halide forming said tabular grains additionally forming nontabular extensions of said tabular grains at one or more of their corners, and an aggregating spectral sensitizing dye adsorbed to the major crystal faces of the tabular silver halide grains.
Claim 95
Dependent Claim
113 words
A tabular grain silver halide emulsion comprised of a dispersing medium, silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.3 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1, said tabular silver grains being bounded by opposed, substantially parallel {111} major crystal faces, said silver halide forming said tabular grains additionally forming nontabular extensions of said tabular grains at one or more of their corners, and an aggregating spectral sensitizing dye adsorbed to the major crystal faces of the tabular silver halide grains.
Claim 96
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 81 wherein the average aspect ratio is at least 12:1.
Claim 97
Dependent Claim
19 words
A tabular grain silver halide emulsion according to claim 81 wherein the average aspect ratio is at least 20:1.
Claim 98
Dependent Claim
23 words
A tabular grain silver halide emulsion according to claim 81 wherein the dispersing medium is comprised of gelatin or a gelatin derivative peptizer.
Claim 99
Dependent Claim
32 words
A tabular grain silver halide emulsion according to claim 81 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 100
Dependent Claim
29 words
A tabular grain silver halide emulsion according to claim 81 wherein at least one of said tabular grains and said nontabular extensions thereof contain a sensitivity modifier incorporated therein.
Claim 101
Dependent Claim
42 words
In a photographic element comprised of a support and at least one radiation-sensitive emulsion layer, the improvement wherein said emulsion layer is comprised of an emulsion according to claims 1, 24, 30, 35, 40, 45, 50, 60, 66, 71, 76 or 81.
Claim 102
Dependent Claim
30 words
A process of producing a visible photographic image comprising processing in an aqueous alkaline solution in the presence of a developing agent an imagewise-exposed photographic element according to claim 87.
Claim 103
Dependent Claim
93 words
A tabular grain silver halide emulsion comprised of a dispersing medium and silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.5 micron, a diameter of at least 0.6 micron, and an average aspect ratio of greater than 8:1, said tabular silver halide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver salt epitaxially located on and substantially confined to selected surface sites of said tabular grains.
Claim 104
Dependent Claim
93 words
A tabular grain silver halide emulsion comprised of a dispersing medium and silver halide grains, wherein at least 50 percent of the total projected area of said silver halide grains is provided by tabular silver halide grains having a thickness of less than 0.5 micron, a diameter of at least 0.6 micron, and an average aspect ratio of greater than 8:1, said tabular silver halide grains being bounded by opposed, substantially parallel {111} major crystal faces, and silver salt epitaxially located on and substantially confined to selected surface sites of said tabular grains.
Claim 105
Dependent Claim
17 words
A silver halide emulsion according to claim 89 wherein the average aspect ratio is at least 12:1.
Claim 106
Dependent Claim
17 words
A silver halide emulsion according to claim 89 wherein the average aspect ratio is at least 20:1.
Claim 107
Dependent Claim
15 words
A silver halide emulsion according to claim 89 wherein the dispersing medium is a peptizer.
Claim 108
Dependent Claim
17 words
A silver halide emulsion according to claim 92 wherein the peptizer is gelatin or a gelatin derivative.
Claim 109
Dependent Claim
30 words
A silver halide emulsion according to claim 90 wherein the tabular silver halide grains account for at least 70 percent of the total projected area of said silver halide grains.
Claim 110
Dependent Claim
30 words
A silver halide emulsion according to claim 94 wherein the tabular silver halide grains account for at least 90 percent of the total projected area of said silver halide grains.
Claim 111
Dependent Claim
18 words
A silver halide emulsion according to claim 89 wherein the tabular silver halide grains are comprised of bromide.
Claim 112
Dependent Claim
19 words
A silver halide emulsion according to claim 96 wherein the tabular silver halide grains are additionally comprised of iodide.
Claim 113
Dependent Claim
18 words
A silver halide emulsion according to claim 89 wherein the tabular silver halide grains are comprised of chloride.
Claim 114
Dependent Claim
15 words
A silver halide emulsion according to claim 90 wherein the silver salt is silver halide.
Claim 115
Dependent Claim
16 words
A silver halide emulsion acording to claim 89 wherein the silver salt is comprised of bromide.
Claim 116
Dependent Claim
16 words
A silver halide emulsion according to claim 99 wherein the silver salt is comprised of chloride.
Claim 117
Dependent Claim
15 words
A silver halide emulsion according to claim 89 wherein the silver salt is silver thiocyanate.
Claim 118
Dependent Claim
20 words
A silver halide emulsion according to claim 89 wherein a site director is adsorbed to the tabular silver halide grains.
Claim 119
Dependent Claim
17 words
A silver halide emulsion according to claim 103 wherein the site director is a spectral sensitizing dye.
Claim 120
Dependent Claim
25 words
A silver halide emulsion according to claim 104 wherein the spectral sensitizing dye is adsorbed to the tabular silver halide grains in an aggregated form.
Claim 121
Dependent Claim
28 words
A silver halide emulsion according to claim 89 wherein at least one of the silver salt and the tabular silver halide grains contains a sensitivity modifier incorporated therein.
Claim 122
Dependent Claim
29 words
A silver halide emulsion according to claim 89 wherein the silver salt is epitaxially located on less than half of the surface area provided by the major crystal faces.
Claim 123
Dependent Claim
30 words
A silver halide emulsion according to claim 107 wherein the silver salt is epitaxially located on less than 25 percent of the surface area provided by the major crystal faces.
Claim 124
Dependent Claim
30 words
A silver halide emulsion according to claim 108 wherein the silver salt is epitaxially located on less than 10 percent of the surface area provided by the major crystal faces.
Claim 125
Dependent Claim
24 words
A silver halide emulsion according to claim 89 wherein the silver salt is substantially confined to edge sites on the tabular silver halide grains.
Claim 126
Dependent Claim
27 words
A silver halide emulsion according to claim 89 wherein the silver salt is substantially confined to one or more corner sites on the tabular silver halide grains.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |