Patent US3700455A successfully refreshed from Google Patents.
US3700455A
Expired / Lapsed
US
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Color photograph containing fade-preventing agents
Assignee: Konica Minolta Inc
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Filing: 1970-08-31
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Granted: 1972-10-24
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Expires: 1990-08-31
Abstract
Abstract A COMPOUND OF THE FORMULA, 2-((2-(HO-),3-R1,5-R3-PHENYL)-X-),4-R4,6-R2-PHENOL WHEREIN R1, R2, R3 AND R4 ARE INDIVIDUALLY A STRAIGHT CHAIN OR BRANCHED-CHAIN HYDROCARBON RADICAL HAVING 1 TO 18 CARBON ATOMS, THE TOTAL SUM OF CARBON ATOMS OF SAID R1, R2, R3 AND R4 BEING LESS THAN 32; AND X IS -S-, -O-, -SO2 OR -(CH(-R5))N- WHERE N IS AN INTEGER OF 0 TO 3, AND R5 IS A HYDROGEN ATOM OR A LOWER ALKYL GROUP, AND A COLOR IMAGE-FORMING DYE ARE INCORPORATED INTO A SILVER HALIDE PHOTOGRAPHIC COMPOSITION. WHEN DEVELOPED, A COLOR IMAGE HAVING IMPROVED LIGHT FASTNESS IS OBTAINED. AN ULTRAVIOLET RAY ABSORBING AGENT AND/OR A COLOR COUPLER MAY BE INCORPORATED INTO THE COMPOSITION.
Inventors
- 👤 Hidehiko Ishikawa
- 👤 Mikio Sato
- 👤 Syun Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:02
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |