US2816028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric gentisamide antistain agents for color photography
Assignee: Eastman Kodak Co
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Filing: 1955-07-29
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Granted: 1957-12-10
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Louis M Minsk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:14
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/396; C; C08; C08F; C08F16/00; C08F16/02; C08F8/00; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A COLOR-FORMING PHOTGRAPHIC EMULSION HAVING REDUCED FOGGING TENDENCY, COMPRISING A SILVER HALIDE EMUL SION HAVING INCORPORATED THEREIN A NON-DIFFUSING COLOR COUPLER CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPER TO PRODUCE A DYE AND, AS AN INHIBITOR OF COLOR STAIN, A NON-DUFFUSING POLYMERIC COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
52 words
A COLOR-FORMING PHOTGRAPHIC EMULSION HAVING REDUCED FOGGING TENDENCY, COMPRISING A SILVER HALIDE EMUL SION HAVING INCORPORATED THEREIN A NON-DIFFUSING COLOR COUPLER CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPER TO PRODUCE A DYE AND, AS AN INHIBITOR OF COLOR STAIN, A NON-DUFFUSING POLYMERIC COMPOUND HAVING THE STRUCTURE:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |