US3291606A
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: 1963-04-23
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Granted: 1966-12-13
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Expires: 1983-04-23
Abstract
No abstract record available.
Inventors
- 👤 Jeffreys Roy Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:21
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF INHIBITING THE DISCOLORATION OF A WATER-PERMEABLE PHOTOGRAPHIC LAYER CONTAINING A COLOR IMAGE, SAID LAYER BEING SUBSTANTIALLY FREE OF DEVELOPED SILVER AND RESIDUAL SILVER HALIDE, WHICH COMPRISES IMBIBING IN SAID LAYER AN AQUEOUS SOLUTION OF AN AMINO ACID SELECTED FROM THE CLASS CONSISTING OF GLYCINE, B-ALANINE, BETAINE, AN ALKYGLYCINE IN WHICH THE ALKYL GROUP HAS FROM 1 TO 6 CARBON ATOMS, AND DIPEPTIDES OF THE SAID ACIDS.
Claim 2
Independent Claim
69 words
THE METHOD OF INHIBITING THE DISCOLORATION OF A WATER-PERMEABLE PHOTOGRAPHIC LAYER CONTAINING A COLOR IMAGE, SAID LAYER BEING SUBSTANTIALLY FREE OF DEVELOPED SILVER AND RESIDUAL SILVER HALIDE, WHICH COMPRISES IMBIBING IN SAID LAYER AN AQUEOUS SOLUTION OF AN AMINO ACID SELECTED FROM THE CLASS CONSISTING OF GLYCINE, B-ALANINE, BETAINE, AN ALKYGLYCINE IN WHICH THE ALKYL GROUP HAS FROM 1 TO 6 CARBON ATOMS, AND DIPEPTIDES OF THE SAID ACIDS.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |