US4948714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of photographic silver halide materials
Assignee: UBS AG
•
Filing: 1989-08-22
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Granted: 1990-08-14
•
Expires: 2009-08-22
Abstract
Abstract Method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing.
Inventors
- 👤 William E. Long
- 👤 Kenneth M. McCombe
- 👤 Marion R. Palmer
- 👤 Terence C. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; G03C1/43; G03C7/00; G03C7/30; G03C7/305; G03C7/30541; G03C7/30552
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
172 words
A method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing which method comprises subjecting photographic silver halide material to an imagewise exposure, developing the latent image by use of a black and white developing solution in the presence of a phenol compound of the general formula I ##STR7## wherein one or both of the substituents X and Y is a hydroxy group, and the other substituent X or Y, and the substituents R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are each hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, dialkyl amino, alkyl thio, substituted alkyl thio, halogen, sulphonic acid or a metal salt thereof, or carboxylic acid or a metal salt thereof, ester or amide groups and wherein any two adjacent substituent groups may represent the atoms necessary to complete a heterocyclic or carbocyclic annelated ring which is optionally substituted.
Claim 2
Independent Claim
172 words
A method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing which method comprises subjecting photographic silver halide material to an imagewise exposure, developing the latent image by use of a black and white developing solution in the presence of a phenol compound of the general formula I ##STR7## wherein one or both of the substituents X and Y is a hydroxy group, and the other substituent X or Y, and the substituents R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are each hydrogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, dialkyl amino, alkyl thio, substituted alkyl thio, halogen, sulphonic acid or a metal salt thereof, or carboxylic acid or a metal salt thereof, ester or amide groups and wherein any two adjacent substituent groups may represent the atoms necessary to complete a heterocyclic or carbocyclic annelated ring which is optionally substituted.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein the compounds of formula I are present in the black and white developing solution.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein the compounds of formula I are present in the silver halide photographic material.
Claim 5
Dependent Claim
20 words
A method according to claim 2 wherein the silver halide photographic material contains a Lippmann fine grain silver halide emulsion.
Claim 6
Dependent Claim
26 words
A method according to claim 2 wherein the compounds of formula I are incorporated into the silver halide photographic material in solution in the coating medium.
Claim 7
Dependent Claim
51 words
A method according to claim 3 wherein the compound of formula I the substituents X, Y, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are hydrogen, lower alkyl groups, lower alkoxy groups or water solubilising groups.
Claim 8
Dependent Claim
29 words
A method according to claim 3 wherein the compound of formula I is incorporated into the silver halide photographic material in an oil phase dispersed in the coating medium.
Claim 9
Dependent Claim
54 words
A method according to claim 7 wherein the compound of formula I one or more of the groups X, Y, R 1 , R 2 , R 3 , R 4 , R 5 R 6 , R 7 and R 8 comprises an oil solubilising ballasting group containing at least 4 carbon atoms.
Claim 10
Dependent Claim
68 words
A method according to claim 1, wherein the compounds of formula I R 2 and R 4 to R 8 are hydrogen, X and Y are hydrogen or hydroxy, R 1 is hydrogen or methyl, R 3 is methyl, methoxy, --CO 2 H, --CH 2 CO 2 H, --OCH 2 CO 2 H or R 3 forms together with Y a radical of the formula --OCH 2 O--.
Claim 11
Dependent Claim
26 words
A method according to claim 1 wherein the phenol compound is of the formula II ##STR8## wherein R 9 is an alkyl or substituted alkyl group.
Claim 12
Dependent Claim
23 words
A method according to claim 2 wherein the concentration of compound of formula I present in the developing solution is about 0.1 g/liter.
Claim 13
Dependent Claim
37 words
A method according to claim 3 wherein the compound of formula I is incorporated in a silver halide layer of the photographic material at a coating weight of between 1 mg/dm 2 to 0.1 mg/dm 2 .
Claim 14
Dependent Claim
15 words
A method according to claim 1 wherein the black and white developing solution comprises hydroquinone.
Claim 15
Dependent Claim
15 words
Photographic silver halide material which has been processed by the method claimed in claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |