Patent US2546400A successfully refreshed from Google Patents.
US2546400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color yielding elements for color photography
Assignee: EIDP Inc
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Filing: 1945-12-11
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Granted: 1951-03-27
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Expires: 1965-12-11
Abstract
No abstract record available.
Inventors
- 👤 Murray Otis Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:43
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PHOTOGRAPHIC ELEMENT COMPRISING SUPPORT, A LIGHT-SENSITIVE COLLOID-SILVER HALIDE EMULSION LAYER SUPERPOSED THEREON BEARING ON ITS ENTIRE SURFCE A DRY OUTER LAYER OF A WATER-SOLUBLE COLLOID WHICH IS INSOLUBLE IN AQUEOUS ALKALINE DEVELOPER SOLUTIONS CONTAINING AT LEAST 2% BY WEIGHT OF DISSOLVED INORGANIC SALTS, SAID OUTER LAYER CONTAINING MOBILE COLOR FORMER WHICH IS CAPABLE OF COUPLING WITH OXIDIZED PRIMARY AROMATIC AMINO DEVELOPING AGENTS TO FORM A DYE TAKEN FROM THE GROUP CONSISTING OF QUINONEIMINE AND AZOMETHINE DYES.
Claim 2
Dependent Claim
77 words
A PHOTOGRAPHIC ELEMENT COMPRISING SUPPORT, A LIGHT-SENSITIVE COLLOID-SILVER HALIDE EMULSION LAYER SUPERPOSED THEREON BEARING ON ITS ENTIRE SURFCE A DRY OUTER LAYER OF A WATER-SOLUBLE COLLOID WHICH IS INSOLUBLE IN AQUEOUS ALKALINE DEVELOPER SOLUTIONS CONTAINING AT LEAST 2% BY WEIGHT OF DISSOLVED INORGANIC SALTS, SAID OUTER LAYER CONTAINING MOBILE COLOR FORMER WHICH IS CAPABLE OF COUPLING WITH OXIDIZED PRIMARY AROMATIC AMINO DEVELOPING AGENTS TO FORM A DYE TAKEN FROM THE GROUP CONSISTING OF QUINONEIMINE AND AZOMETHINE DYES.
References Cited (Backward Citations)
US1905438A
Cited
US1966330A
Cited
US1954337A
Cited
US2159600A
Cited
US2196226A
Cited
US2323246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |