US3667960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrally supersensitized silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
•
Filing: 1970-03-27
•
Granted: 1972-06-06
•
Expires: 1990-03-27
Abstract
Abstract SUPERSENSITIZATION OF SILVER HALIDE PHOTOGRAPHIC EMULSIONS BY EMPLOYING A COMBINATION OF SPECIFIC SENSITIZING DYES, ONE CONTAINING A HETEROCYCLIC NUCLEUS SELECTED FROM THE GROUP CONSISTING OF NAPHTHOSELENAZOLE AND NAPHTHOXAZOLE AND THE OTHER OF WHICH CONTAINING A 2-QUINOLINE NUCLEUS. THE PARTICULAR COMBINATION OF SPECTRAL SENSITIZING DYES EMPLOYED PROVIDE A HIGH DEGREE OF SUPERSENSITIZATION OVER THE ENTIRE VISIBLE RANGE.
Inventors
- 👤 Keisuke Shiba
- 👤 Sato Akira
- 👤 Motohiko Tsubota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |