US4758501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic acetanilide couplers and photographic elements containing them
Assignee: Eastman Kodak Co
•
Filing: 1987-06-05
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Granted: 1988-07-19
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Expires: 2007-06-05
Abstract
Abstract Novel photographic acetanilide dye-forming couplers comprise a group comprising a stabilizer moiety represented by the formula: <IMAGE> wherein R is halogen or alkoxy having 1 to 4 carbon atoms; R1 is hydrogen, halogen, alkyl or alkoxy; R2 and R3 are individually alkyl; and, X is a linking group. Such couplers provide advantageous stability in dyes formed from the couplers. These couplers are useful in photographic silver halide materials and processes.
Inventors
- 👤 Paul R. Buckland
- 👤 Siu C. Tsoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:31
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a yellow dye-forming acetanilide coupler having a group comprising a stabilizer moiety represented by the formula: ##STR40## wherein R is halogen or alkoxy having 1 to 4 carbon atoms; R 1 is hydrogen, halogen, alkyl or alkoxy; R 2 and R 3 are individually alkyl; and X is a linking group.
Claim 2
Dependent Claim
68 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a yellow dye-forming acetanilide coupler having a group comprising a stabilizer moiety represented by the formula: ##STR40## wherein R is halogen or alkoxy having 1 to 4 carbon atoms; R 1 is hydrogen, halogen, alkyl or alkoxy; R 2 and R 3 are individually alkyl; and X is a linking group.
Claim 3
Dependent Claim
29 words
A photographic element as in claim 1 wherein the group comprising the stabilizer moiety is a ballast group that enables the coupler to be non-diffusible in the photographic element.
Claim 4
Dependent Claim
62 words
A photographic element as in claim 1 wherein the coupler is represented by the formula: ##STR41## wherein R is halogen or alkoxy having 1 to 4 carbon atoms; R 1 is hydrogen, halogen, alkyl or alkoxy; R 2 and R 3 are individually alkyl; X is a linking group; Y is hydrogen or a coupling-off group; and Z is t-butyl or p-alkoxyphenyl.
Claim 5
Dependent Claim
13 words
A photographic element as in claim 1 wherein R is chloro or methoxy.
Claim 6
Dependent Claim
16 words
A photographic element as in claim 1 wherein R 1 is hydrogen, chloro, methyl or methoxy.
Claim 7
Dependent Claim
17 words
A photographic element as in claim 1 wherein X is alkylene, --O--, --alkylene--O--, --COO--alkylene--O--, --O--alkylene--O--, or --NH--.
Claim 8
Dependent Claim
16 words
A photographic element as in claim 1 wherein the group comprising the stabilizer moiety is: ##STR42##
Claim 9
Dependent Claim
12 words
A photographic element as in claim 1 wherein the coupler is: ##STR43##
Claim 10
Dependent Claim
71 words
A color photographic element as in claim 1 comprising a red-sensitive silver halide emulsion unit having associated therewith at least one cyan dye-forming coupler; a green-sensitive silver halide emulsion unit having associated therewith at least one magenta dye-forming coupler; and, at least one blue-sensitive silver halide emulsion unit having associated therewith at least one yellow dye-forming coupler; and, wherein said acetanilide coupler is associated with at least one of said units.
Claim 11
Dependent Claim
35 words
A process of forming a photographic image which comprises developing an exposed silver halide emulsion layer with a color developing agent in the presence of a yellow dye-forming acetanilide coupler as defined in claim 1.
Claim 12
Dependent Claim
12 words
A process as in claim 10 wherein the pivaloylacetanilide coupler is: ##STR44##
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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) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |