US4839160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers capable of absorbing ultraviolet radiation, their preparation and their use in cosmetic compositions
Assignee: L'Oréal SA
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Filing: 1987-03-25
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Granted: 1989-06-13
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Expires: 2007-03-25
Abstract
Abstract An ultraviolet radiation absorbing polymer having units of formula I: ##STR1## wherein X is a group derived from benzylidene-bornanone of formula II ##STR2## wherein R 1 represents hydrogen or C 1 -C 12 alkoxy and R 2 represents C 4 -C 12 alkyl. The polymer is useful in protecting human skin against sunburn.
Inventors
- 👤 Serge Forestier
- 👤 Claude Mahieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:01
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8158; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58; A61K2800/00; A61K2800/40; A61K2800/57; Y; Y10; Y10S; Y10S424/00; Y10S424/05
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A cosmetic composition for protecting the skin against ultraviolet radiations having wavelengths ranging from 315-340 nm comprising in a cosmetically acceptable vehicle suitable for topical application to the skin an ultraviolet-absorbing polymer having units of formula I ##STR9## wherein X is a group derived from the benzylidene-bornanone of formula II: ##STR10## wherein R 1 represents hydrogen or C 1 -C 12 alkoxy and R 2 represents C 4 -C 12 alkoxy, said polymer being present in an amount ranging from 0.2 to 20 weight percent based on the total weight of said composition.
Claim 2
Dependent Claim
93 words
A cosmetic composition for protecting the skin against ultraviolet radiations having wavelengths ranging from 315-340 nm comprising in a cosmetically acceptable vehicle suitable for topical application to the skin an ultraviolet-absorbing polymer having units of formula I ##STR9## wherein X is a group derived from the benzylidene-bornanone of formula II: ##STR10## wherein R 1 represents hydrogen or C 1 -C 12 alkoxy and R 2 represents C 4 -C 12 alkoxy, said polymer being present in an amount ranging from 0.2 to 20 weight percent based on the total weight of said composition.
Claim 3
Dependent Claim
14 words
The cosmetic composition of claim 1 wherein R 1 represents hydrogen, methoxy or butoxy.
Claim 4
Dependent Claim
15 words
The cosmetic composition of claim 1 wherein R 2 represents butoxy, hexyloxy, octyloxy or dodecyloxy.
Claim 5
Dependent Claim
40 words
The cosmetic composition of claim 1 wherein said polymer also contains units of formula I': ##STR11## wherein X 1 represents a group derived from bornanone of formula II': ##STR12## wherein R 3 represents hydrogen or C 1 -C 4 alkyl.
Claim 6
Dependent Claim
21 words
The cosmetic composition of claim 1 wherein said polymer contains at least 5 mole percent of the units of formula I.
Claim 7
Dependent Claim
27 words
The cosmetic composition of claim 4 wherein the mole ratio of units of formula I to the units of formula I' ranges from 5:95 to 95:5, respectively.
Claim 8
Dependent Claim
18 words
The cosmetic composition of claim 1 wherein said polymer has a molar mass ranging from 1,000 to 1,000,000.
Claim 9
Dependent Claim
18 words
The cosmetic composition of claim 1 wherein said polymer has a molar mass ranging from 1,500 to 100,000.
Claim 10
Dependent Claim
32 words
A process for protecting human skin from sunburn comprising applying thereto the cosmetic composition of claim 1 in an amount effective to protect said skin against ultraviolet radiations ranging from 315-340 nm.
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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |