Patent US5352570A successfully refreshed from Google Patents.
US5352570A
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Method and photographic material and process comprising a benzotriazole compound
Assignee: Eastman Kodak Co
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Filing: 1991-06-28
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Granted: 1994-10-04
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Expires: 2011-06-28
Abstract
Abstract A new method of preparation of a single isomer of a benzotriazole compound comprises the step of reacting a benzotriazole compound containing symmetrical substituents on the benzo ring with phosgene to produce the corresponding carbamyl chloride. The carbamyl chloride can be reacted with a timeing group of a coupling-off group of a photographic coupler to form a photographic development inhibitor releasing coupler. Such compounds are useful in photographic materials and processes.
Inventors
- 👤 William J. Begley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:51
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30541; G03C7/30558; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and at least one benzotriazole development inhibitor releasing naphtholic wash-out coupler which forms a dye that is capable of being washed out of the photographic element upon processing comprising an amide water solubilizing group in the 2-position of the naphthol moiety wherein the benzotriazole development inhibitor is represented by the formula: ##STR16## wherein R 1 O is an unsubstituted alkoxy group.
Claim 2
Dependent Claim
77 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and at least one benzotriazole development inhibitor releasing naphtholic wash-out coupler which forms a dye that is capable of being washed out of the photographic element upon processing comprising an amide water solubilizing group in the 2-position of the naphthol moiety wherein the benzotriazole development inhibitor is represented by the formula: ##STR16## wherein R 1 O is an unsubstituted alkoxy group.
Claim 3
Dependent Claim
84 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and at least one benzotriazole development inhibitor releasing naphtholic wash-out coupler which forms a dye that is capable of being washed out of the photographic element upon processing comprising an amide water solubilizing group selected from CONH 2 and CONHCH 3 in the 2-position of the naphthol moiety wherein the benzotriazole development inhibitor is represented by the formula: ##STR17## wherein R 1 O is an unsubstituted alkoxy group.
Claim 4
Dependent Claim
84 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and at least one benzotriazole development inhibitor releasing naphtholic wash-out coupler which forms a dye that is capable of being washed out of the photographic element upon processing comprising an amide water solubilizing group selected from CONH 2 and CONHCH 3 in the 2-position of the naphthol moiety wherein the benzotriazole development inhibitor is represented by the formula: ##STR17## wherein R 1 O is an unsubstituted alkoxy group.
Claim 5
Dependent Claim
42 words
A color photographic element as in claim 2 wherein the benzotriazole development inhibitor releasing coupler is represented by the formula: ##STR18## wherein OR 1 is an unsubstituted alkoxy group; TIME is a photographic timing group; and n is 0, 1 or 2.
Claim 6
Dependent Claim
15 words
A color photographic element as in claim 3 wherein TIME comprises a ballasted carbamate group.
Claim 7
Dependent Claim
18 words
A color photographic element as in claim 2 wherein the amide water solubilizing group is --CONH 2 .
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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) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |