Patent US3707375A successfully refreshed from Google Patents.
US3707375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic light sensitive materials having improved light fastness
Assignee: Fujifilm Holdings Corp
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Filing: 1970-10-07
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Granted: 1972-12-26
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Expires: 1990-10-07
Abstract
Abstract A COLOR PHOTOGRAPHIC LIGHT SENSITIVE MATERIAL COMPRISING A SUPPORT AND A PHOTOGRAPHIC LAYER CONTAINING A COMPOUND REPRESENTED BY THE FOLLOWING FORMULA: 1-(R-O-),4-(R''-OOC-C(-CN)=CH-)BENZENE WHEREIN R AND R'', WHICH MAY BE THE SAME OR DIFFERENT, REPRESENT AN ALKYL GROUP HAVING FROM 1 TO 20 CARBON ATOMS, THE SUM OF THE CARBON ATOMS OF SAID R AND R'' BEING AT LEAST 5.
Inventors
- 👤 Reiichi Ohi
- 👤 Tokiharu Kondo
- 👤 Kazuo Shirasu
- 👤 Yoshiaki Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:19
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |