US3167478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilized hair dye composition of ammonia and trihydroxybenzene
Assignee: L'Oréal SA
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Filing: 1963-03-21
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Granted: 1965-01-26
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charle Roger
- 👤 Lantz Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:17
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/10; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/34; A61K8/347; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/30; D06P3/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A PROCESS FOR THE PRODUCTION OF A COMPOSITION FOR DYEING LIVING HAIR WHICH COMPRISES: (A) PREPARING A SOLUTION CONTAINING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF 1,2,4-TRIHYDROXYBENZENE AND 1-METHYL-2,4,5-TRIHYDROXYBENZENE, (B) ADDING AMMONIA IN EXCESS OF THAT NECESSARY FOR THE REACTION, THE IMPROVEMENT OF (C) ALLOWING THE SOLUTION TO REACT FOR A TIME OF AT LEAST ONE HOUR TO 50 DAYS OF CONTACT WITH THE AIR, AND (D) THEREAFTER ELIMINATING THE UNCOMBINED AMMONIA BY NEUTRALIZING WITH AN ACID WHEREBY SAID SOLUTION, STORED OUT OF CONTACT WITH THE AIR, KEEPS AT ALL TIMES, ITS DYEING PROPERTIES UNCHANGED.
Claim 2
Dependent Claim
97 words
IN A PROCESS FOR THE PRODUCTION OF A COMPOSITION FOR DYEING LIVING HAIR WHICH COMPRISES: (A) PREPARING A SOLUTION CONTAINING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF 1,2,4-TRIHYDROXYBENZENE AND 1-METHYL-2,4,5-TRIHYDROXYBENZENE, (B) ADDING AMMONIA IN EXCESS OF THAT NECESSARY FOR THE REACTION, THE IMPROVEMENT OF (C) ALLOWING THE SOLUTION TO REACT FOR A TIME OF AT LEAST ONE HOUR TO 50 DAYS OF CONTACT WITH THE AIR, AND (D) THEREAFTER ELIMINATING THE UNCOMBINED AMMONIA BY NEUTRALIZING WITH AN ACID WHEREBY SAID SOLUTION, STORED OUT OF CONTACT WITH THE AIR, KEEPS AT ALL TIMES, ITS DYEING PROPERTIES UNCHANGED.
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) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |