US4046574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic material with homophthalimide thioether development inhibitor
Assignee: Agfa Gevaert AG
•
Filing: 1976-01-20
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Granted: 1977-09-06
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Expires: 1996-01-20
Abstract
Abstract A color photographic material having a silver halide emulsion layer and containing a thioether compound which is reactable on chromogenic development thereby releasing a diffusible substance which inhibits the development of the silver halide. The thioether compound is a homophthalimide containing a removable mercapto group containing moiety in the 4-position and its nitrogen in the 2-position atom being a tertiary nitrogen.
Inventors
- 👤 Heinrich Odenwalder
- 👤 Erwin Ranz
- 👤 Walter Puschel
- 👤 Hans Vetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:19
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A light-sensitive color photographic material with at least one silver halide emulsion layer, containing at least one dye image producing compound and containing a development inhibitor releasing homophthalimide thioether compound capable of reacting with the oxidation product of an aromatic primary amino silver halide developing agent to form a releasable mercaptan capable of inhibiting photographic development the said homophthalimide thioether compounds are substituted with the sulfur of the thioether group in the 4-position and the nitrogen atom of the imido group in the 2-position of the homophthalimide is a tertiary nitrogen atom substituted with an alkyl, aryl, heterocyclic or an acylamino group.
Claim 2
Dependent Claim
102 words
A light-sensitive color photographic material with at least one silver halide emulsion layer, containing at least one dye image producing compound and containing a development inhibitor releasing homophthalimide thioether compound capable of reacting with the oxidation product of an aromatic primary amino silver halide developing agent to form a releasable mercaptan capable of inhibiting photographic development the said homophthalimide thioether compounds are substituted with the sulfur of the thioether group in the 4-position and the nitrogen atom of the imido group in the 2-position of the homophthalimide is a tertiary nitrogen atom substituted with an alkyl, aryl, heterocyclic or an acylamino group.
Claim 3
Dependent Claim
65 words
The material of claim 1, wherein the homophthalimide thioether compound has the following formula ##STR24## wherein X represents an aliphatic, aromatic or hetercyclic group R stands for an alkyl, aryl, heterocyclic or an acylamino group, R 1 represents hydrogen, alkyl or alkoxy having up to 5 carbon atoms, sulfamyl, nitro, amine, acylamine or halogen and n stands for an integer of between 1 and 3.
Claim 4
Dependent Claim
13 words
The material of claim 2 wherein R is a diffusion resistant rendering group.
Claim 5
Dependent Claim
38 words
The material of claim 3 wherein R is a long chained or branched aliphatic group of between 8 and 20 carbon atoms or a phenyl group containing at least one aliphatic group of 1 to 20 carbon atoms.
Claim 6
Dependent Claim
24 words
The material of claim 2 wherein X is a heterocyclic ring selected from the groups consisting of tetrazolyl, triazolyl, thiadiazolyl, thiazolyl, pyrimidyl or triazinyl.
Claim 7
Dependent Claim
11 words
The material of claim 5 wherein X is a 1-phenyltetrazolyl group.
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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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |