Patent US4871652A successfully refreshed from Google Patents.
US4871652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide material and process
Assignee: Eastman Kodak Co
•
Filing: 1988-09-07
•
Granted: 1989-10-03
•
Expires: 2008-09-07
Abstract
Abstract Novel cyano substituted photographic couplers are represented by the formula: ##STR1## wherein m, R 1 , R 2 , R 3 , R 4 , R 5 and Z are as defined in the specification. These couplers enable effective magenta dye formation upon reaction with an oxidized color photographic silver halide developing agent. The couplers are useful in photographic silver halide materials and processes.
Inventors
- 👤 Sharon E. Normandin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:20
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/45; C07C255/46; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a photographic coupler represented by the formula: ##STR16## wherein m is 0 or 1; R 1 is unsubstituted or substituted alkyl or aryl; R 2 , R 3 , R 4 and R 5 are individually hydrogen or unsubstituted or substituted alkyl or aryl, or R 3 with at least one of R 1 and R 5 represents the atoms necessary to form unsubstituted or substituted 5- or 6-member carbocyclic or heterocyclic rings; and Z is hydrogen or a coupling-off group.
Claim 2
Dependent Claim
97 words
A photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a photographic coupler represented by the formula: ##STR16## wherein m is 0 or 1; R 1 is unsubstituted or substituted alkyl or aryl; R 2 , R 3 , R 4 and R 5 are individually hydrogen or unsubstituted or substituted alkyl or aryl, or R 3 with at least one of R 1 and R 5 represents the atoms necessary to form unsubstituted or substituted 5- or 6-member carbocyclic or heterocyclic rings; and Z is hydrogen or a coupling-off group.
Claim 3
Dependent Claim
116 words
A photographic element as in claim 1 wherein the coupler is represented by the formula: ##STR17## wherein X is cyano, alkyl, or aryl; n is 0, 1, 2, 3 or 4; R 8 and R 9 are individually alkyl containing 1 to 5 carbon atoms or aryl; or hydrogen; R 10 , R 11 , R 12 and R 14 are individually hydrogen, or unsubstituted or substituted alkyl or aryl; R 13 is unsubstituted or substituted alkyl or aryl, or with R 14 represents the atoms necessary to form a 5- or 6-member carbocyclic or heterocyclic ring; A is a ring atom selected from O, N, or C; and Z is hydrogen or a coupling-off group.
Claim 4
Dependent Claim
49 words
A photographic element as in claim 1 wherein the coupler is represented by the formula: ##STR18## wherein R 15 is unsubstituted or substituted alkyl or aryl; R 16 and R 17 are individually hydrogen or unsubstituted or substituted alkyl or aryl; and Z is hydrogen or a coupling-off group.
Claim 5
Dependent Claim
12 words
A photographic element as in claim 1 wherein the coupler is: ##STR19##
Claim 6
Dependent Claim
44 words
A process of forming a dye image in an exposed photographic silver halide element comprising a support bearing at least one photographic silver halide emulsion layer comprising developing the exposed photographic element in the presence of a dye-forming coupler as defined in claim 1.
Claim 7
Dependent Claim
23 words
A process as in claim 5 wherein the coupler is represented by the formula (II), (III) or (IV) as defined in claim 2.
References Cited (Backward Citations)
US2380809A
Cited
US2435173A
Cited
US2600788A
Cited
US2897079A
Cited
US3502468A
Cited
GB1247493A
Cited
GB1252418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |