US3770447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive silver halide color photographic material containing indazolone couplers
Assignee: Agfa Gevaert AG
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Filing: 1971-12-29
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Granted: 1973-11-06
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Expires: 1991-12-29
Abstract
Abstract A light-sensitive photographic material with at least one silver halide emulsion layer which contains indazolone derivatives as couplers for the production of the magenta partial image, which indazolone couplers are represented by the following formula: WHEREIN THE RADICALS R1, R2, X, Y and Z are denoted in the description.
Inventors
- 👤 I Boie
- 👤 W Schulte
- 👤 D Freitag
- 👤 F Nittel
- 👤 W Pelz
- 👤 H Krimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:16
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/54; C07D231/56; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3231
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
21 words
A light-sensitive photographic material containing at least one silver halide emulsion layer, which contains a magenta coupler of the following formula:
Claim 2
Dependent Claim
14 words
A material as claimed in claim 1 in which Z denotes a sulfo group.
Claim 3
Dependent Claim
33 words
A material as claimed in claim 1 in which at least one of the radicals R1, R2, X, Y and Z contains a large hydrocarbon radical which has at least 12 carbon atoms.
Claim 4
Dependent Claim
25 words
A material as claimed in claim 1 in which at least one of the radicals X and Y is halogen, alkyl, alkoxy, aroxy or acylamino.
Claim 5
Dependent Claim
14 words
A material as claimed in claim 2 in which Z denotes a sulfo group.
Claim 6
Dependent Claim
33 words
A material as claimed in claim 2 in which at least one of the radicals R1, R2, X, Y and Z contains a large hydrocarbon radical which has at least 12 carbon atoms.
Claim 7
Dependent Claim
25 words
A material as claimed in claim 1 in which at least one of the radicals X and Y is halogen, alkyl, alkoxy, aroxy or acylamino.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |