US2803544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colour couplers for use in colour photography
Assignee: Imperial Chemical Industries Ltd
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Filing: 1954-02-08
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Granted: 1957-08-20
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Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Colin W Greenhalgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:35
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A LIGHT-SENSITIVE GELATINO-SILVER HALIDE EMULSION LAYER CONTAINING A COLOUR COUPLER SELECTED FROM THE GROUP CONSISTING OF 1-PHENYL-3-BENZYLAMINO-5-PYRAZOLONE, 1PHENYL-3-BUTYLAMINO-5-PYRAZOLONE, 1-PHENYL-3-METHYLAMINO-5-PYRAZOLONE, 1-PHENYL-3-CYCLOHEXYLAMINO-5-PYRAZOLONE, 1-P-NITROPHENYL-3-BENZYLAMINO-5-PYRAZOLONE, 1-PAMINOPHENYL-3-BENZYLAMINO-5-PYRAZOLONE, 1-P-OCTADECENYL-SUCCINAMINOPHENYL -3 -BENZYLAMINO -5-PYRAZOLONE, 1-PHENYL-3-B-ACETOXYETHYLAMINO-5-PYRAZOLONE, 1-PHENYL-3B-HYDROXY-ETHYLAMINO-5-PYRAZOLONE, 1-PHENYL-3-B-ACETAMI5-PYRAZOLONE, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO-5-PYRAZOLONE, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO-5-PYRAZANODIETHYLAMINO)-BENZYLIDENE-5 -PYRAZOLONE, 1-P-SULPHOPHENYL -3-OCTADECYLAMINO -4-P-(N-METHYL-N-BSULPHOETHYLAMINO)-BENZYLIDENE-5-PYRAZOLONE AND THE ALKALI METAL SALTS THEREOF, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO4-(2,4-DIMETHOXY)-BENZYLIDENE-5-PYRAZOLONE, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO, 5-SULPHATOPYRAZOLE 1-(4''-(4"CHLOROPHENOXY) - PHENYL) 3-OCTADECYLAMINO-5-PYRAZOLONE.
Claim 2
Dependent Claim
48 words
A LIGHT-SENSITIVE GELATINO-SILVER HALIDE EMULSION LAYER CONTAINING A COLOUR COUPLER SELECTED FROM THE GROUP CONSISTING OF 1-PHENYL-3-BENZYLAMINO-5-PYRAZOLONE, 1PHENYL-3-BUTYLAMINO-5-PYRAZOLONE, 1-PHENYL-3-METHYLAMINO-5-PYRAZOLONE, 1-PHENYL-3-CYCLOHEXYLAMINO-5-PYRAZOLONE, 1-P-NITROPHENYL-3-BENZYLAMINO-5-PYRAZOLONE, 1-PAMINOPHENYL-3-BENZYLAMINO-5-PYRAZOLONE, 1-P-OCTADECENYL-SUCCINAMINOPHENYL -3 -BENZYLAMINO -5-PYRAZOLONE, 1-PHENYL-3-B-ACETOXYETHYLAMINO-5-PYRAZOLONE, 1-PHENYL-3B-HYDROXY-ETHYLAMINO-5-PYRAZOLONE, 1-PHENYL-3-B-ACETAMI5-PYRAZOLONE, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO-5-PYRAZOLONE, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO-5-PYRAZANODIETHYLAMINO)-BENZYLIDENE-5 -PYRAZOLONE, 1-P-SULPHOPHENYL -3-OCTADECYLAMINO -4-P-(N-METHYL-N-BSULPHOETHYLAMINO)-BENZYLIDENE-5-PYRAZOLONE AND THE ALKALI METAL SALTS THEREOF, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO4-(2,4-DIMETHOXY)-BENZYLIDENE-5-PYRAZOLONE, 1-P-SULPHOPHENYL-3-OCTADECYLAMINO, 5-SULPHATOPYRAZOLE 1-(4''-(4"CHLOROPHENOXY) - PHENYL) 3-OCTADECYLAMINO-5-PYRAZOLONE.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |