US4452989A
Expired / Lapsed
US
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Substantive moisturizing derivatives of 2-pyrrolidone-5-carboxylic acid and compositions containing same
Assignee: Yves Saint Laurent Parfums SA
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Filing: 1982-06-01
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Granted: 1984-06-05
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Expires: 2002-06-01
Abstract
Abstract Derivatives of 2-pyrrolidone-5-carboxylic acid having excellent moisturizing properties are provided which have the structure <IMAGE> wherein R1 and R2 are the same or different and are lower alkyl and aralkyl and n is 1 to 8 and including cationic salts thereof such as the pyrrolidone carboxylic acid salt thereof. These compounds are useful as moisturizing agents. Cosmetics, shampoos, hair conditioners and skin toners containing such compounds are also provided.
Inventors
- 👤 George E. Deckner
- 👤 Hedwig O'Grady
- 👤 Albert Zofchak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:16
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/4906; A61K8/4913; C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/273; C07D207/277; C07D207/28; A61Q5/00; A61Q5/02; A61Q5/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
A moisturizing compound of the structure ##STR11## wherein n is 1 to 8 and R 1 and R 2 are the same or different and are lower alkyl or aralkyl, in the form of its amine oxide, betaine or quaternary ammonium salt having the structure ##STR12##
Claim 2
Dependent Claim
46 words
A moisturizing compound of the structure ##STR11## wherein n is 1 to 8 and R 1 and R 2 are the same or different and are lower alkyl or aralkyl, in the form of its amine oxide, betaine or quaternary ammonium salt having the structure ##STR12##
Claim 3
Dependent Claim
28 words
The compound as defined in claim 1 as the amine oxide having the structure ##STR13## wherein n, R 1 and R 2 are as defined in claim 1.
Claim 4
Dependent Claim
27 words
The compound as defined in claim 1 as the betaine having the structure ##STR14## wherein n, R 1 and R 2 are as defined in claim 1.
Claim 5
Dependent Claim
27 words
The compound as defined in claim 1 as the betaine having the structure ##STR15## wherein n, R 1 and R 2 are as defined in claim 1.
Claim 6
Dependent Claim
28 words
The compound as defined in claim 1 as the quaternary salt having the structure ##STR16## wherein n, R 1 and R 2 are as defined in claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |