US3756821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the formation of color photographic images
Assignee: Fujifilm Holdings Corp
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Filing: 1971-09-29
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Granted: 1973-09-04
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Expires: 1991-09-29
Abstract
Abstract A PROCESS FOR THE FORMATION OF COLOR PHOTOGRAPHIC IMAGES ON A MULTI-LAYER TYPE COLOR PHOTOGRAPHIC LIGHTSENSITIVE MATERIAL HAVING AT LEAST TWO SILVER HALIDE EMULSION LAYERS ON A SUPPORT, WHICH COMPRISES DEVELOPING SAID LIGHT-SENSITIVE MATERIAL WITH A COMPOUND OF THE FORMULA: R-S-C<(-Q-N=) WHEREIN Q REPRESENTS AN ATOMIC GROUP NECCESSARY TO COMPLETE A HETEROCYCLIC RING, WHICH MAY FURTHER BE SUBSTITUTED AND R IS AN ALKYL GROUP HAVING 1-6 CARBON ATOMS, WHICH MAY FURTHER BE SUBSTITUTED 1-6 CARBON ATOMS, WHICH MAY FURTHER BE SUBSTITUTED OR A PHENYL GROUP, WHICH MAY BE SUBSTITUTED.
Inventors
- 👤 J Hayashi
- 👤 T Shishido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:04
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/3924
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |