US4933272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing internally modified silver halide grains
Assignee: Eastman Kodak Co
•
Filing: 1988-04-08
•
Granted: 1990-06-12
•
Expires: 2008-04-08
Abstract
Abstract Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing a nitrosyl or thionitrosyl coordination ligand and a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements.
Inventors
- 👤 Woodrow G McDugle
- 👤 Anthony D. Gingello
- 👤 John A. Haefner
- 👤 John E. Keevert, Jr.
- 👤 Alfred P. Marchetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; G03C1/06; G03C1/08; G03C1/09; G03C1/485; G03C1/48515; G03C1/48523
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
44 words
A photographic silver halide emulsion comprised of radiation-sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing a nitrosyl or thionitrosyl coordination ligand and a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements.
Claim 2
Dependent Claim
44 words
A photographic silver halide emulsion comprised of radiation-sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing a nitrosyl or thionitrosyl coordination ligand and a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements.
Claim 3
Dependent Claim
18 words
A photographic emulsion according to claim 1 further characterized in that said crystal lattice contains a nitrosyl ligand.
Claim 4
Dependent Claim
42 words
A photographic emulsion according to claim 1 further characterized in that said emulsion contains a hexacoordination complex of a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements containing at least one nitrosyl or thionitrosyl ligand.
Claim 5
Dependent Claim
61 words
A photographic emulsion according to claim 3 further characterized in that said hexacoordination complex satisfies the formula: [ML.sub.4 (NY)L'].sup.n where M is a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements; L is a bridging ligand; L' is L or (NY); Y is oxygen or sulfur; and n is zero, -1, -2, or -3.
Claim 6
Dependent Claim
50 words
A photographic emulsion according to claim 4 further characterized in that said emulsion is a direct positive emulsion in which the silver halide grains are surface fogged and the transition metal complex is present in the surface fogged silver halide grains in a concentration sufficient to internally trap photogenerated electrons.
Claim 7
Dependent Claim
32 words
A direct positive photographic emulsion according to claim 5 further characterized in that said emulsion contains from about 10 -8 to 10 -3 mole per silver mole of the transition metal complex.
Claim 8
Dependent Claim
31 words
A direct positive photographic emulsion according to claim 6 further characterized in the emulsion contains from about 10 -6 to 10 -4 mole per silver mole of the transition metal complex.
Claim 9
Dependent Claim
22 words
A photographic emulsion according to claim 4 further characterized in that M is a group 8 to 10 inclusive heavy transition metal.
Claim 10
Dependent Claim
22 words
A photographic emulsion according to claim 4 further characterized in that M is a group 5 to 7 inclusive light transition metal.
Claim 11
Dependent Claim
62 words
A photographic emulsion according to claim 4 further characterized in that said hexacoordination complex satisfies the formula: [M.sup.1 (NO)(L.sup.1).sub.5 ].sup.m wherein m is zero, -1, -2, or -3, M 1 represents chromium, rhenium, ruthenium, osmium, or iridium, and L 1 represents one or a combination of halide and cyanide ligands or a combination of these ligands with up to two aquo ligands.
Claim 12
Dependent Claim
39 words
A photographic emulsion according to claim 10 further characterized in that said silver halide grains contain at least 50 mole percent chloride and less than 5 mole percent iodide, based on total silver, with any residual halide being bromide.
Claim 13
Dependent Claim
37 words
A photographic emulsion according to claim 11 Further characterized in that said emulsion is a color print emulsion which contains at least 70 mole percent chloride and less than 2 mole percent iodide, based on total silver.
Claim 14
Dependent Claim
32 words
A photographic emulsion according to claim 12 further characterized in that M 1 is a transition metal chosen from the class consisting of rhenium, ruthenium, and osmium and L 1 is halide.
Claim 15
Dependent Claim
40 words
A photographic emulsion according to claim 11 further characterized in that the emulsion is a monodispersed emulsion having a mean grain size of less than 0.7 μm and containing the transition metal complex in an amount sufficient to increase contrast.
Claim 16
Dependent Claim
31 words
A photographic emulsion according to claim 14 further characterized in that the transition metal complex is present in a concentration of from 2×10 -8 to 1×10 -4 mole per silver mole.
Claim 17
Dependent Claim
31 words
A photographic emulsion according to claim 15 further characterized in that the transition metal complex is present in a concentration of from 2×10 -8 to 3×10 -5 mole per silver mole.
Claim 18
Dependent Claim
36 words
A photographic emulsion according to claim 15 further characterized in that M 1 is chosen from the class consisting of ruthenium and osmium and L 1 is chosen from the class consisting of chloride and bromide.
Claim 19
Dependent Claim
25 words
A photographic emulsion according to claim 10 further characterized in that said transition metal complex is present in an amount sufficient to reduce photographic speed.
Claim 20
Dependent Claim
29 words
A photographic emulsion according to claim 18 further characterized in that said transition metal complex is present in a concentration of less than 10 -4 mole per silver mole.
Claim 21
Dependent Claim
36 words
A photographic emulsion according to claim 19 further characterized in that M 1 chosen from the class consisting of ruthenium and osmium and L 1 is chosen from the class consisting of chloride, bromide, and iodide.
Claim 22
Dependent Claim
31 words
A photographic emulsion according to claim 20 further characterized in that said transition metal complex is present in a concentration of from 1×10 -9 to 5×10 -5 mole per silver mole.
Claim 23
Dependent Claim
42 words
A photographic emulsion according to claim 11 further characterized in that said emulsion is surface sensitized with at least one of gold and middle chalcogen and said transition metal complex is present in a concentration sufficient to reduce low intensity reciprocity failure.
Claim 24
Dependent Claim
29 words
A photographic emulsion according to claim 22 further characterized in that said transition metal complex is present in a concentration of less than 1×10 -4 mole per silver mole.
Claim 25
Dependent Claim
29 words
A photographic emulsion according to claim 23 further characterized in that M 1 is chosen from the class consisting of rhenium, ruthenium, and osmium and L 1 is chloride.
Claim 26
Dependent Claim
31 words
A photographic emulsion according to claim 24 further characterized in that said transition metal complex is present in a concentration of from 1×10 -9 to 5×10 -5 mole per silver mole.
References Cited (Backward Citations)
US2448060A
Cited
US3890154A
Cited
US3790390A
Cited
US4126472A
Cited
US4147542A
Cited
US4643965A
Cited
JPS62212641A
Cited
EP0242190A2
Cited
US4835049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |