US3095302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting discoloration of color photographic layers containing dye images and resulting photographic products
Assignee: Eastman Kodak Co
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Filing: 1959-01-21
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Granted: 1963-06-25
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Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jeffreys Roy Arthur
- 👤 Davenport Arthur Neil
- 👤 Saunders David George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:10
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046; Y; Y10; Y10S; Y10S430/00; Y10S430/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF INHIBITING THE DISCOLORATION OF A WATER PERMEABLE PHOTOGRAPHIC LAYER CONTAINING AN IMAGE COMPOSED OF A DYE SELECTED FROM THE GROUP CONSISTING OF AZOMETHINE, INDOANILINE, INDOPHENOL AND INDAMINE DYES, SAID LAYER BEING SUBSTANTIALLY FREE FROM DEVELOPED SILVER AND RESIDUAL SILVER HALIDE WHICH COMPRISES INHIBITING IN SAID LAYER AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP OF POLYHYDROXY COMPOUNDS CONSISTING OF: 3,3,5,5-TETRAHYDROXYMETHYL TETRAHYDRO-Y-PYRONE 3,3,5,5-TETRAHYDROXYMETHYL TETRAHYDROPYRAN-4-OL QUINIC ACID HEXOSES HEXOSE-HEXOSES MONOAMINO DERIVATIVES OF HEXOSES AND THEIR SALTS HEXITOLS METHYLENE ETHERS OF HEXITOLS AND ALLOWING SAID LAYER TO DRY CONTAINING SUFFICIENT ABSORBED TREATING AGENT TO INHIBIT DISCOLORATION OF SAID LAYER.
Claim 2
Independent Claim
101 words
THE METHOD OF INHIBITING THE DISCOLORATION OF A WATER PERMEABLE PHOTOGRAPHIC LAYER CONTAINING AN IMAGE COMPOSED OF A DYE SELECTED FROM THE GROUP CONSISTING OF AZOMETHINE, INDOANILINE, INDOPHENOL AND INDAMINE DYES, SAID LAYER BEING SUBSTANTIALLY FREE FROM DEVELOPED SILVER AND RESIDUAL SILVER HALIDE WHICH COMPRISES INHIBITING IN SAID LAYER AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP OF POLYHYDROXY COMPOUNDS CONSISTING OF: 3,3,5,5-TETRAHYDROXYMETHYL TETRAHYDRO-Y-PYRONE 3,3,5,5-TETRAHYDROXYMETHYL TETRAHYDROPYRAN-4-OL QUINIC ACID HEXOSES HEXOSE-HEXOSES MONOAMINO DERIVATIVES OF HEXOSES AND THEIR SALTS HEXITOLS METHYLENE ETHERS OF HEXITOLS AND ALLOWING SAID LAYER TO DRY CONTAINING SUFFICIENT ABSORBED TREATING AGENT TO INHIBIT DISCOLORATION OF SAID LAYER.
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |