Patent US2768078A successfully refreshed from Google Patents.
US2768078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements containing reaction products of polyvinylsulfonates with c-amino pyridines
Assignee: Eastman Kodak Co
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Filing: 1954-08-25
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Granted: 1956-10-23
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Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Delbert D Reynolds
- 👤 William D Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:04
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/22; G03C7/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON AT LEAST ONE SILVER HALIDE EMULSION LAYER HAVING DISTRIBUTED THEREIN A PLYVINYL RESIN COMPRISING FROM 6% TO 24% BY WEIGHT OF A VINYL PYRIDYLAMINE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
37 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON AT LEAST ONE SILVER HALIDE EMULSION LAYER HAVING DISTRIBUTED THEREIN A PLYVINYL RESIN COMPRISING FROM 6% TO 24% BY WEIGHT OF A VINYL PYRIDYLAMINE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2701243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |