US3824075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing human hair with indamine salts
Assignee: L'Oréal SA
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Filing: 1971-09-14
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Granted: 1974-07-16
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Expires: 1991-09-14
Abstract
Abstract INDAMINE SALTS, HAVING THE FORMULA (1-((4-(R3-N(-R4)-PHENYL)-N=),2-R,3-R5,4-(R1-N(+)(-R2)=) 5-R6-CYCLOHEXA-2,5-DIENE)N (X)N(-) WHEREIN R1 AND R2 ARE LOWER ALKYL, R3 AND R4 ARE LOWER ALKYL WHICH CAN BE SUBSTITUTED WITH HYDROXY, AMINO OR ACYLAMINO, R5 AND R6 ARE HYDROGEN, LOWER ALKYL OR LOWER ALKOXY, R IS AMINO, ACYLAMINO OR HYDROXY, N IS 1-2 AND XN(-) IS AN ANION, ARE USEFUL FOR DYEING KERATINOUS FIBERS AND, IN PARTICULAR, HUMAN HAIR, THESE SALTS CAN BE IN A TAUTOMERIC FORM OF THAT REPRESENTED ABOVE.
Inventors
- 👤 F Estradier
- 👤 G Kalopissis
- 👤 A Bugaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:27
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/10; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/413; Y; Y10; Y10S; Y10S424/00; Y10S424/01; Y10S424/02
Claims Analysis
Total Claims: 0
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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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |