US3834866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation dye compositions containing 5-aminoguaiacols as couplers
Assignee: Alberto Culver Co
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Filing: 1972-04-04
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Granted: 1974-09-10
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Expires: 1992-04-04
Abstract
Abstract WHEREIN R IS ALKYL, ACETYL, CARBAMYLMETHYL OR B-HYDROXYETHYL, WHEREIN THE ALKYL RADICAL CONTAINS 1 TO 4 CARBON ATOMS, IS DESCRIBED, AS WELL AS AQUEOUS DYE SOLUTIONS FOR HUMAN HAIR CONTAINING SAID 5-AMINOGUAIACOL DERIVATIVES AND DYE BASES DERIVED FROM O- AND P-PHENYLENEDIAMINES AND FROM O- AND P-AMINOPHENOLS. 2-(H3C-O-),5-(R-NH-)-PHENOL THE SYNTHESIS OF 5-AMINOGUAIACOL DERIVATIVES OF THE FORMULA
Inventors
- 👤 F Pum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/12; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/415; A61Q; A61Q5/00; A61Q5/10
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |