US3359111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardening compositions with pyrazolone couplers
Assignee: Eastman Kodak Co
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Filing: 1965-08-27
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Granted: 1967-12-19
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Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 John H Van Campen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION USEFUL IN COLOR PHOTOGRAPHY WHICH CONTAINS A PYRAZOLONE COUPLER CAPABLE OF FORMING AN AZOMETHINE DYE WITH A PHENYLENEDIAMINE DEVELOPER AND A HARDENER HAVING THE FORMULA
Claim 2
Dependent Claim
30 words
A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION USEFUL IN COLOR PHOTOGRAPHY WHICH CONTAINS A PYRAZOLONE COUPLER CAPABLE OF FORMING AN AZOMETHINE DYE WITH A PHENYLENEDIAMINE DEVELOPER AND A HARDENER HAVING THE FORMULA
References Cited (Backward Citations)
US3140177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |