US4168977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1977-08-11
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Granted: 1979-09-25
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Expires: 1997-08-11
Abstract
Abstract A negative image silver halide photographic emulsion comprising substantially surface latent image-type silver chlorobromide or silver chlorobromoiodide grains with an iodide content of up to about 7 mol%, wherein the mean grain size of the silver halide grains is not greater than about 0.7μ, a binder is present in an amount of not more than about 250 g per mol of silver halide, and at least one compound represented by the following general formula (I): r.sup.1 nhnhcho (i) wherein R 1 represents an aryl group.
Inventors
- 👤 Shunji Takada
- 👤 Yoshitaka Akimura
- 👤 Hiroyuki Mifune
- 👤 Nobuyuki Tsujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
A negative image forming process which comprises imagewise exposing to light a photographic light-sensitive material comprising a support having thereon at least one silver halide photographic emulsion layer comprising substantially surface latent image monodispersed silver chlorobromide or silver chlorobromoiodide grains containing up to about 7 mol% silver iodide, wherein the average grain size of said silver halide grains is about 0.7 micron or less and a hydrophilic binder in an amount of about 250 g of less per mol of silver halide, wherein said silver halide photographic emulsion layer or at least one other hydrophilic colloid layer on said support contains a compound represented by the general formula (I): r.sup.1 nhnhcho (i) wherein R 1 represents a phenyl group which may be unsubstituted or substituted with one or more alkyl groups, aralkyl groups, alkoxy groups, amino groups, acylamino groups or aromatic acylamino groups, and developing said photographic light-sensitive material with a developing solution containing a developing agent and about 0.15 mol/liter or more of sulfite ion and having a pH of about 11.0 to about 12.3.
Claim 2
Dependent Claim
176 words
A negative image forming process which comprises imagewise exposing to light a photographic light-sensitive material comprising a support having thereon at least one silver halide photographic emulsion layer comprising substantially surface latent image monodispersed silver chlorobromide or silver chlorobromoiodide grains containing up to about 7 mol% silver iodide, wherein the average grain size of said silver halide grains is about 0.7 micron or less and a hydrophilic binder in an amount of about 250 g of less per mol of silver halide, wherein said silver halide photographic emulsion layer or at least one other hydrophilic colloid layer on said support contains a compound represented by the general formula (I): r.sup.1 nhnhcho (i) wherein R 1 represents a phenyl group which may be unsubstituted or substituted with one or more alkyl groups, aralkyl groups, alkoxy groups, amino groups, acylamino groups or aromatic acylamino groups, and developing said photographic light-sensitive material with a developing solution containing a developing agent and about 0.15 mol/liter or more of sulfite ion and having a pH of about 11.0 to about 12.3.
Claim 3
Dependent Claim
22 words
The negative image forming process as set forth in claim 1, wherein the compound represented by the general formula (I) is: ##STR12##
Claim 4
Dependent Claim
22 words
The negative image forming process as set forth in claim 1, wherein the compound represented by the general formula (I) is: ##STR13##
Claim 5
Dependent Claim
38 words
The negative image forming process as set forth in claim 1, wherein at least one benzotriazole compound is incorporated into a light-sensitive emulsion layer or a non-light sensitive hydrophilic colloid layer or is present in the developing solution.
Claim 6
Dependent Claim
21 words
The negative image forming process as set forth in claim 4, wherein said benzotriazole compound is present in said developing solution.
Claim 7
Dependent Claim
21 words
The negative image forming process as set forth in claim 22, wherein said benzotriazole is present in said light-sensitive emulsion layer.
Claim 8
Dependent Claim
23 words
The negative image forming process as set forth in claim 4, wherein said benzotriazole is present in said non-light sensitive hydrophilic colloid layer.
Claim 9
Dependent Claim
73 words
The negative image forming process is set forth in claim 4, wherein the benzotriazole compound is represented by the following general formula (II): ##STR14## wherein Y represents an alkyl group, a halogen atom, an alkoxy group, an acyl group, an acylamino group, a carbamoyl group, a sulfamoyl group, or a monocyclic or bicyclic aryl group; n represents 0, 1 or 2; X represents a hydrogen atom, a halogen atom or an acyl group.
Claim 10
Dependent Claim
23 words
The negative image forming process as set forth in claim 8, wherein the benotriazole compound represented by the general formula (II) is 5-methylbenzotriazole.
Claim 11
Dependent Claim
27 words
The negative image forming process as set forth in claim 1, wherein the average grain size of said silver halide grains is about 0.4 micron or less.
Claim 12
Dependent Claim
23 words
The negative image forming process as set forth in claim 1, wherein the silver halide photographic emulsion contains at least one water-insoluble polymer.
Claim 13
Dependent Claim
88 words
The negative image forming process as set forth in claim 11, wherein the water-insoluble polymer is a polymer containing, as a monomer unit or units, a monomer unit or units of alkyl methacrylate, alkyl acrylate, alkoxyalkyl methacrylate, alkoxyalkyl acrylate, glycidyl methacrylate, glycidyl acrylate, methacrylamide, acrylamide, vinyl ester, acrylonitrile, olefin, styrene, or a combination thereof; or a combination of said monomer unit or units with a monomer unit or units of acrylic acid, methacrylic acid, α,β-unsaturated dicarboylic acid, hydroxyalkyl methacrylate, hydroxyalkyl acrylate, sulfoalkyl methacrylate, sulfoalkyl acrylate or styrenesulfonic acid.
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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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |