Patent US2140347A successfully refreshed from Google Patents.
Patent US3661161A successfully refreshed from Google Patents.
US3661161A
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Process for setting hair with polycondensable urea and thiourea compounds
Assignee: L'Oréal SA
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Filing: 1969-12-03
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Granted: 1972-05-09
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Expires: 1989-12-03
Abstract
Abstract Hair is set by impregnating the same, in the presence of an acidic catalyst, with a polymerizable compound having the formula WHEREIN X is oxygen or sulfur and R, R'', R1 and R2 each are hydrogen or lower alkyl, winding the hair on rollers and drying the hair.
Inventors
- 👤 Gregoire Kalopissis
- 👤 Henry Philippe De Beaulieu
- 👤 Jean-Louis Abegg
- 👤 Giuliana Ghilardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:47
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61Q; A61Q5/00; A61Q5/04; A61K2800/00; A61K2800/80; A61K2800/95; Y; Y10; Y10S; Y10S424/00; Y10S424/01; Y10S424/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
The process of claim 1 wherein said compound is selected from the group consisting of 4,5-dihydroxyethylene urea, 4,5-dihydroxyethylene thiourea, 4,5-dihydroxyethylene dimethylurea, 4,5-dimethoxyethylene urea and 4,5-dihydroxyethylene diethylurea.
Claim 2
Dependent Claim
58 words
The process of claim 1 wherein said acidic aqueous solution consists essentially of an aqueous solution of a member selected from the group consisting of lactic acid, acetic acid, formic acid, citric acid, sulfuric acid, hydrochloric acid, phosphoric acid and sodium and potassium monophosphates, said member being present in amounts effective to polymerize said compound on said hair.
Claim 3
Dependent Claim
27 words
A process for setting hair comprising impregnating said hair with an effective amount of a composition comprising an aqueous solution of a polymerizable compound having the formula
References Cited (Backward Citations)
US3079297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |