US4562138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen-containing heterocyclic blocked mercapto development inhibitors
Assignee: Konica Minolta Inc
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Filing: 1984-08-21
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Granted: 1985-12-31
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Expires: 2004-08-21
Abstract
Abstract This invention relates to nitrogen containing heterocyclic compounds represented by the general formula ##STR1## wherein Z is non-metallic atoms necessary to form a tetrazole, a benzotriazole or a benzothiazole, either substituted or unsubstituted, n is either 1 or 2 and R is alkyl or phenyl. The above mentioned compounds can be suitably used in a photographic material as a development inhibitor precursor.
Inventors
- 👤 Morito Uemura
- 👤 Kaoru Onodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:38
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C8/00; G03C8/02; G03C8/08; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/161
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A photographic material which comprises at least one photosensitive silver halide emulsion layer and a development inhibitor releasing compound represented by the following formula; wherein Z represent non-metallic atoms necessary for forming a 5- or 6-membered heterocyclic ring, n represents an integer of 1 or 2 and R represents an alkyl, phenyl, alkylene or phenylene group provided that when n is 1, R represents an alkyl or phenyl group and when n is 2, R represents an alkylene or phenylene group.
Claim 2
Dependent Claim
81 words
A photographic material which comprises at least one photosensitive silver halide emulsion layer and a development inhibitor releasing compound represented by the following formula; wherein Z represent non-metallic atoms necessary for forming a 5- or 6-membered heterocyclic ring, n represents an integer of 1 or 2 and R represents an alkyl, phenyl, alkylene or phenylene group provided that when n is 1, R represents an alkyl or phenyl group and when n is 2, R represents an alkylene or phenylene group.
Claim 3
Dependent Claim
20 words
A photographic material according to claim 1 wherein the heterocyclic ring is a tetrazole ring, benzotriazole ring or benzothiazole ring.
Claim 4
Dependent Claim
16 words
A photographic material according to claim 1 wherein the heterocyclic ring is a phenyl-substituted tetrazole ring.
Claim 5
Dependent Claim
11 words
A photographic material according to claim 1 wherein n is 1.
Claim 6
Dependent Claim
21 words
A photographic material according to claim 1 wherein R is an alkyl or alkylene group having 1 to 25 carbon atoms.
Claim 7
Dependent Claim
21 words
A photographic material according to claim 1 wherein R is an alkyl or alkylene group having 1 to 3 carbon atoms.
Claim 8
Dependent Claim
28 words
A photographic material according to claim 1 wherein R is an alkyl or phenyl group each of which is either unsubstituted or substituted by a electron donative group.
Claim 9
Dependent Claim
16 words
A photographic material according to claim 1 wherein the compound has a chemical structure of ##STR7##
Claim 10
Dependent Claim
18 words
A photographic material according to claim 1 wherein said photographic material further comprises a dye image forming substance.
Claim 11
Dependent Claim
16 words
A photographic material according to claim 9 wherein said photographic material further comprises an image-receiving layer.
Claim 12
Dependent Claim
19 words
A photographic material according to claim 9 wherein said dye image forming substance is a dye releasing redox compound.
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |