US2548564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide element with mordanted dye layer
Assignee: Eastman Kodak Co
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Filing: 1946-12-31
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Granted: 1951-04-10
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Expires: 1966-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
- 👤 Leslie G S Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:00
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON AT LEAST ONE SILVER HALIDE EMULSION LAYER AND A LAYER OF GELATIN HAVING DISTRIBUTED THEREIN A SUBSTANTIALLY WATER-INSOLUBLE SALT OF A WATER-SOLUBLE ACID DYE WITH A QUATERNARY AMMONIUM SALT OF A POLYMERIZED HETEROCYCLIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF POLYMERIZED VINYL SUBSTITUTED AZINES, POLYMERIZED VINYL SUBSTITUTED AZOLES, AND THEIR HOMOLOGUES.
Claim 2
Dependent Claim
60 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON AT LEAST ONE SILVER HALIDE EMULSION LAYER AND A LAYER OF GELATIN HAVING DISTRIBUTED THEREIN A SUBSTANTIALLY WATER-INSOLUBLE SALT OF A WATER-SOLUBLE ACID DYE WITH A QUATERNARY AMMONIUM SALT OF A POLYMERIZED HETEROCYCLIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF POLYMERIZED VINYL SUBSTITUTED AZINES, POLYMERIZED VINYL SUBSTITUTED AZOLES, AND THEIR HOMOLOGUES.
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) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |