US4374766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined allantoin-hydrolyzed animal protein product and method
Assignee: Yves Saint Laurent Parfums SA
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Filing: 1982-06-01
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Granted: 1983-02-22
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Expires: 2002-06-01
Abstract
Abstract A stable form of allantoin is provided which takes the form of a combined allantoin-hydrolyzed animal protein product which may be employed in the form of a hydroalcoholic solution, such as a cologne, after-shave lotion or skin toner, containing at least about 0.5% by weight allantoin which remains in solution, without crystallizing out, over extended periods of time. Methods for increasing the stability of allantoin and for forming a stable form of allantoin are also provided.
Inventors
- 👤 Eugene Puchalski
- 👤 Frances A. Donahue
- 👤 Richard P. Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:32
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/88; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/4946; A61K8/64; A61K8/65; A61Q; A61Q19/00; A61Q19/002
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
22 words
A stable form of allantoin which remains in aqueous-alcoholic solution over extended periods of time, comprising a combined allantoin-hydrolyzed animal protein product.
Claim 2
Dependent Claim
22 words
A stable form of allantoin which remains in aqueous-alcoholic solution over extended periods of time, comprising a combined allantoin-hydrolyzed animal protein product.
Claim 3
Dependent Claim
25 words
The stable form of allantoin as defined in claim 1 wherein said allantoin and hydrolyzed animal protein are combined in the form of a complex.
Claim 4
Dependent Claim
35 words
The stable form of allantoin as defined in claim 1 wherein said hydrolyzed animal protein is present in a weight ratio to the allantoin of within the range of from about 100:1 to about 1:1.
Claim 5
Dependent Claim
39 words
The stable form of allantoin as defined in claim 1 in the form of an aqueous solution containing from about 0.05 to about 5% by weight allantoin and from about 0.1 to about 10% by weight hydrolyzed animal protein.
Claim 6
Dependent Claim
48 words
The stable form of allantoin as defined in claim 4 wherein the allantoin is present in an amount within the range of from about 0.5 to about 2% and the hydrolyzed animal protein is present in an amount within the range of from about 0.1 to about 1.5%.
Claim 7
Dependent Claim
34 words
The stable form of allantoin as defined in claim 1 wherein the hydrolyzed animal protein is a collagen-derived animal protein having a molecular weight within the range of from about 100 to about 300,000.
Claim 8
Dependent Claim
16 words
The stable form of allantoin as defined in claim 4 further including ethanol or isopropyl alcohol.
Claim 9
Dependent Claim
30 words
A method for increasing the stability and solubility of allantoin in hydroalcoholic solutions, which comprises combining allantoin with hydrolyzed animal protein to form the product as defined in claim 1.
Claim 10
Dependent Claim
49 words
A method for preparing the product as defined in claim 1, which comprises heating and mixing a mixture of allantoin and hydrolyzed animal protein in the presence of water at a temperature within the range of from about 45° to about 80° C. until a clear solution is formed.
References Cited (Backward Citations)
US2303765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |