US4529691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic recording material containing color couplers
Assignee: Agfa Gevaert AG
•
Filing: 1984-04-04
•
Granted: 1985-07-16
•
Expires: 2004-04-04
Abstract
Abstract Yellow couplers corresponding to the formula ##STR1## wherein Y represents an aromatic, aliphatic or cycloaliphatic group, X represents hydrogen or a releasable group, R 1 represents halogen, and R 2 and R 3 each represent an alkyl group having 1 to 20 carbon atoms, are readily soluble in oil formers and undergo coupling with a high color yield. They are resistant to heat and moisture and undergo color development to yield stable yellow dyes with an absorption maximum below 450 nm. They have a high absorption capacity in the near UV region and are virtually unaffected by fluctuations in the pH during processing.
Inventors
- 👤 Gunter Renner
- 👤 Erich Wolff
- 👤 Friedhelm Sommer
- 👤 Herbert Stark
- 👤 Dieter Stieler
- 👤 Egon Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/12; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C07D235/00; C07D235/02; C07D235/04; C07D235/06; C07D235/12; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A color photographic recording material having at least one light-sensitive silver halide emulsion layer and a non-diffusible yellow coupler associated with this layer wherein the improvement comprises the yellow coupler corresponds to the following formula: ##STR22## wherein Y represents a p-alkoxyphenyl group selected from the group consisting of the following groups: ##STR23## X represents a hydrogen atom or a group which is releasable in the process of color coupling, R 1 represents a halogen atom, and R 2 and R 3 represent identical or different alkyl groups, each having 1 to 20 carbon atoms, including substituted alkyl groups.
Claim 2
Dependent Claim
98 words
A color photographic recording material having at least one light-sensitive silver halide emulsion layer and a non-diffusible yellow coupler associated with this layer wherein the improvement comprises the yellow coupler corresponds to the following formula: ##STR22## wherein Y represents a p-alkoxyphenyl group selected from the group consisting of the following groups: ##STR23## X represents a hydrogen atom or a group which is releasable in the process of color coupling, R 1 represents a halogen atom, and R 2 and R 3 represent identical or different alkyl groups, each having 1 to 20 carbon atoms, including substituted alkyl groups.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |