US2710801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-diffusing polymeric reducing agents for photographic color emulsions
Assignee: Eastman Kodak Co
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Filing: 1952-04-15
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Granted: 1955-06-14
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Expires: 1972-04-15
Abstract
No abstract record available.
Inventors
- 👤 Louis M Minsk
- 👤 William O Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:37
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
55 words
A COLOR-FORMING PHOTOGRAPHIC EMULSION HAVING REDUCED FOGGING TENDENCY, COMPRISING A SILVER HALIDE EMULSION HAVING INCROPORATED THEREIN A NON-DIFFUSING COLOR COUPLER AND, AS AN INHIBITOR OF COLOR STAIN, A NON-DIFFUSING POLYMERIC COMPOUND HAVING AS PART OF ITS MOLECULE RECURRING UNITS CONTAINING AT LEAST TWO HYDROXYL GROUPS, TWO OF WHICH HYDROXYL GROUPS ARE PART OF THE STRUCTURE:
Claim 2
Dependent Claim
55 words
A COLOR-FORMING PHOTOGRAPHIC EMULSION HAVING REDUCED FOGGING TENDENCY, COMPRISING A SILVER HALIDE EMULSION HAVING INCROPORATED THEREIN A NON-DIFFUSING COLOR COUPLER AND, AS AN INHIBITOR OF COLOR STAIN, A NON-DIFFUSING POLYMERIC COMPOUND HAVING AS PART OF ITS MOLECULE RECURRING UNITS CONTAINING AT LEAST TWO HYDROXYL GROUPS, TWO OF WHICH HYDROXYL GROUPS ARE PART OF THE STRUCTURE:
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) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |