US2739059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of hydroxyl containing polyvinyl resin treated with an amino acetal as a silver halide binder
Assignee: Eastman Kodak Co
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Filing: 1952-08-12
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Granted: 1956-03-20
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Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 William J Priest
- 👤 Charles F H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F8/00; C08F8/30; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A PHOTOGRAPHIC ELEMENT COMPRISING POLYVINYL ALCOHOL MODIFIED BY REACTING WITH B-AMINO DIETHYL ACETAL AND CONTAINING A LIGHT-SENSITIVE SILVER HALIDE SALT.
Claim 2
Dependent Claim
20 words
A PHOTOGRAPHIC ELEMENT COMPRISING POLYVINYL ALCOHOL MODIFIED BY REACTING WITH B-AMINO DIETHYL ACETAL AND CONTAINING A LIGHT-SENSITIVE SILVER HALIDE SALT.
References Cited (Backward Citations)
US2481434A
Cited
DE526497C
Cited
GB509012A
Cited
US2310943A
Cited
US2320422A
Cited
US2276322A
Cited
US2518704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |