US3576587A
Expired / Lapsed
US
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Method for dyeing hair and anthraquinone dyestuff composition
Assignee: L'Oréal SA
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Filing: 1968-07-01
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Granted: 1971-04-27
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Expires: 1988-07-01
Abstract
Abstract NEW HAIR DYEING COMPOUND RESPONDING TO THE FORMULA 1-(CH3-CO-NH-(CH2)N-NH-)ANTHRAQUINONE IN WHICH N IS A WHOLE NUMBER LYING BETWEEN 2 AND 6 INCLUSIVE AND METHOD FOR MAKING THE SAME AS WELL AS AN AQUEOUS SOLUTION THEREOF AS A COMPOSITION FOR DYEING HAIR.
Inventors
- 👤 Gregoire Kalopissis
- 👤 Andree Bugaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:43
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; A61K8/355; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; C09B1/50; C09B1/51; C09B1/515
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |