US3583971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-hydroxy-4-(alkoxycarbonylphenylazo) 2-(n-naphthyl)naphthamides
Assignee: Individual
•
Filing: 1967-07-25
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Granted: 1971-06-08
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Expires: 1987-07-25
Abstract
Abstract WHEREIN R REPRESENTS A SUBSTITUTED OR UNSUBSTITUTED NAPHTHALENE RING RESIDUAL GROUP, SAID GROUP BEING BONDED TO THE AMIDO GROUP AT THE A-POSITION, AND X REPRESENTS AN ARYL GROUP HAVING AT LEAST ONE ALKOXYCARBONYL GROUP. 2-(R-NH-CO-),4-(X-N=N-)-NAPHTH-1-OL MAGENTA-COLORED CYAN COUPLER HAVING A REMARKABLE AUTO-MASKING ACTION FOR CORRECTING DEFICIENCIES OF REGENERATION OF COLOR PHOTOGRAPHIC MATERIAL, HAVING A HIGH COUPLING ACTIVITY, HAVING THE GENERAL FORMULA;
Inventors
- 👤 Makoto Yoshida
- 👤 Keisuke Shiba
- 👤 Akio Okumuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:58
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |