US4189465A
Expired / Lapsed
US
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Method for inhibiting nitrosamine formation
Assignee: ROBECO Inc
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Filing: 1978-05-08
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Granted: 1980-02-19
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Expires: 1998-05-08
Abstract
Abstract Nitrosamine formation in topical products is inhibited by the addition of an unsaturated hydrocarbon having at least one double bond to the composition at at least one percent by weight based on the overall composition. The preferred unsaturated hydrocarbon is squalene.
Inventors
- 👤 Maurice L. Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:53
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K47/00; A61K47/06; A61K8/00; A61K8/18; A61K8/30; A61K8/31; A61K9/00; A61K9/0012; A61K9/0014; A61K2800/00; A61K2800/40; A61K2800/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
A method for inhibiting the formation of nitrosamines in topical products containing an amine and a nitrosating agent which comprises incorporating into such products at least one percent by weight of squalene based on the overall composition.
Claim 2
Independent Claim
37 words
A method for inhibiting the formation of nitrosamines in topical products containing an amine and a nitrosating agent which comprises incorporating into such products at least one percent by weight of squalene based on the overall composition.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the squalene is incorporated at at least 2 weight percent.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein the squalene is incorporated at about 2 to about 50 weight percent.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the squalene is a partially hydrogenated squalene having at least one site of unsaturation.
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) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |