US3669672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supersensitized silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1970-01-09
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Granted: 1972-06-13
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Expires: 1990-01-09
Abstract
Abstract A SPECTRALLY SENSITIZED SILVER HALIDE PHOTOGRAPHIC EMULSION, HAVING IMPROVED SENSITIVITY IN THE RED-SENSITIVE REGION, YET NO INCREASE IN FOGGING, COMPRISING A COMBINATION OF A PENTAMETHINECYANINE-TYPE DYE AND AN AROMATIC HETEROCYCLIC COMPOUND HAVING A THIO-KETO STRUCTURE IS DISCLOSED.
Inventors
- 👤 Keisuke Shiba
- 👤 Reiichi Ohi
- 👤 Tadao Shishido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; C; C09; C09B; C09B23/00; C09B23/0066; C09B23/02; C09B23/06; C09B23/08; C09B23/083
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |