Patent US2544640A successfully refreshed from Google Patents.
US2544640A
Expired / Lapsed
US
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Mixed grain photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1949-06-10
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Granted: 1951-03-13
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Expires: 1969-06-10
Abstract
No abstract record available.
Inventors
- 👤 Chechak Jonas John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:07
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3885
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A LIGHT-SENSITIVE LAYER FOR PRODUCING A COLORED PHOTOGRAPHIC IMAGE UPON EXPOSURE AND DEVELOPMENT, COMPRISING A LAYER OF WATER-PERMEABLE COLLOIDAL MATERIAL HAVING DISPERSED THEREIN (1) PARTICLES OF $-PHENYLPROPYL ALCOHOL CONTAINING SENSITIVE SILVER HALIDE AND A COLOR COUPLER, (2) GRAINLESS SILVER IODIDE AND (3) A NON-COLOR-FORMING HYDROXY BENZENE REDUCING AGENT.
Claim 2
Dependent Claim
48 words
A LIGHT-SENSITIVE LAYER FOR PRODUCING A COLORED PHOTOGRAPHIC IMAGE UPON EXPOSURE AND DEVELOPMENT, COMPRISING A LAYER OF WATER-PERMEABLE COLLOIDAL MATERIAL HAVING DISPERSED THEREIN (1) PARTICLES OF $-PHENYLPROPYL ALCOHOL CONTAINING SENSITIVE SILVER HALIDE AND A COLOR COUPLER, (2) GRAINLESS SILVER IODIDE AND (3) A NON-COLOR-FORMING HYDROXY BENZENE REDUCING AGENT.
References Cited (Backward Citations)
US2318597A
Cited
US2490749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |