US2964402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono-acetyl indazolone color couplers
Assignee: Gevaert Photo Producten NV
•
Filing: 1952-09-29
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Granted: 1960-12-13
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Expires: 1972-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jennen Jacob Joseph
- 👤 Eerdekens Hendrik Pieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:38
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
PROCESS FOR THE PRODUCTION OF A COLORED PHOTOGRAPHIC IMAGE, COMPRISING DEVELOPING A REDUCTIBLE SILVER SALT IMAGE IN A PHOTOGRAPHIC ELEMENT BY MEANS OF A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A COLOR COUPLER HAVING THE FOLLOWING FORMULA
Claim 2
Dependent Claim
40 words
PROCESS FOR THE PRODUCTION OF A COLORED PHOTOGRAPHIC IMAGE, COMPRISING DEVELOPING A REDUCTIBLE SILVER SALT IMAGE IN A PHOTOGRAPHIC ELEMENT BY MEANS OF A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A COLOR COUPLER HAVING THE FOLLOWING FORMULA
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |