Patent US3832386A successfully refreshed from Google Patents.
US3832386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic material
Assignee: KANISHIROKU PHOTO IND CO Ltd
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Filing: 1971-05-13
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Granted: 1974-08-27
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Expires: 1991-05-13
Abstract
Abstract WHEREIN X is hydrogen, halogen, a lower alkoxy group, a lower alkyl group or an aryloxy group; and Y is D R A W I N G WHERE R1 is a lower alkyl group; R2 is a hydrocarbon residue having eight to 18 carbon atoms; and COR3 is an acyl group having nine to 20 carbon atoms. A yellow color image-forming coupler, useful as a protect type coupler in a light-sensitive silver halide color photographic emulsion. The coupler has the general formula
Inventors
- 👤 I Inoue
- 👤 T Hanzawa
- 👤 T Endo
- 👤 H Deguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:45
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
A compound as claimed in claim 1, having the formula
References Cited (Backward Citations)
US3644498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |