US3563684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing keratinic fibers and human hair with para-diamines and couplers
Assignee: L'Oréal SA
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Filing: 1965-02-25
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Granted: 1971-02-16
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Expires: 1985-02-25
Abstract
Abstract THE INVENTION RELATES TO DYEING KERATINIC FIBERS WITH A 1-AMINO-4-AMINO-BENZENE WHICH CAN HAVE HALOGEN, ALKYL OR ALKOXY GROUPS ON THE BENZENE RING AND A COUPLER SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED PHENOLS, R3CO-CH2-COR4 AND 1-Z,3-CH3-2-PYRAZOLIN-5-ONE IN WHICH R3 AND R4 ARE BOTH -CH3,R3 IS -CH3 AND R4 IS -OC2H5 AND R3 IS PHENYL AND R4 IS -NH-(1,4-PHENYLENE)-COOH OR -NH-(1,3-PHENYLENE)-COOH AND Z IS A SULPHOPHENYL OR CHLORO-SULPHOPHENYL.
Inventors
- 👤 Roger Charle
- 👤 Gregoire Kalopissis
- 👤 Jean Gascon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:30
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/34; A61K8/347; A61K8/40; A61K8/41; A61K8/411; A61K8/415; A61K8/44; A61K8/445; A61K8/46; A61K8/466; A61K8/49; A61K8/494; A61Q; A61Q5/00; A61Q5/10; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/30; D06P3/305
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |