Patent US2247130A successfully refreshed from Google Patents.
Patent US3676137A successfully refreshed from Google Patents.
US3676137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic light-sensitive element containing magenta coupler and alkyl phosphate solvent
Assignee: Fujifilm Holdings Corp
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Filing: 1970-08-27
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Granted: 1972-07-11
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Expires: 1990-08-27
Abstract
Abstract WHEREIN R1 AND R2 EACH IS AN ALKYL GROUP AND WHEREIN R3 REPRESENTS A MEMBER SELECTED FROM A GROUP CONSISTING OF AN ALKYL GROUP AND AN ARYL GROUP, AND WHEREIN THE TOTAL NUMBER OF THE CARBON ATOMS IN R1, R2 AND R3 RANGES FROM 14 TO 40 CARBONS ATOMS, IS DISCLOSED. R2-O-P(=O)(-O-R1)-O-R3 A LIGHT-SENSITIVE MATERIAL COMPRISING AT LEAST A LAYER OF A SILVER HALIDE EMULSION CONTAINING (1) A NON-DIFFUSING 5-PYRAZOLONE COUPLER HAVING AT LEAST A HYDROPHOBIC BALLASTING GROUP CONTAINING FROM 9 TO 30 CARBON ATOMS AND (2) A COUPLER SOLVENT HAVING THE FORMULA
Inventors
- 👤 Eiichi Mizuki
- 👤 Yasushi Oishi
- 👤 Masao Sawahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:54
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; G; G03; G03C; G03C7/00; G03C7/30; G03C7/3003; G03C7/3005; G03C7/3008; G03C7/3012; G03C7/388; G03C7/3885
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |