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US5032390A
Expired / Lapsed
US
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Anti-suntan cosmetic composition
Assignee: Kao Corp
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Filing: 1989-12-18
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Granted: 1991-07-16
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Expires: 2009-12-18
Abstract
Abstract A novel anti-suntan cosmetic composition comprises from 1 to 25% by weight of fine particulate zinc oxide having an average particle size of from 70 to 300 mμ, which scatters or absorbs ultraviolet rays, especially those in UV-A region. The composition prevent human skin from blotches and freckles, and supress the aging of the skin.
Inventors
- 👤 Katsumasa Iwaya
- 👤 Hajime Hotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:57
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/27; A61Q; A61Q1/00; A61Q1/02; A61Q1/04; A61Q1/06; A61Q17/00; A61Q17/04; B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/04; C09C1/043; C09C1/36; C09C1/3607; C09C1/3684; C01; C01P; C01P2002/00; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/60; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
An anti-suntan cosmetic composition for selectively decreasing the transmittance of the UV-A region ultraviolet rays of 320-400 nm to prevent blotches and freckles in human skin, which comprises 1-25% by weight of fine particulate zinc oxide having an average particle size of 70-300 mμ.
Claim 2
Dependent Claim
44 words
An anti-suntan cosmetic composition for selectively decreasing the transmittance of the UV-A region ultraviolet rays of 320-400 nm to prevent blotches and freckles in human skin, which comprises 1-25% by weight of fine particulate zinc oxide having an average particle size of 70-300 mμ.
Claim 3
Dependent Claim
77 words
An anti-suntan cosmetic composition for selectively decreasing the transmittance of the UV-A region ultraviolet rays of 320-400 nm and the UV-B region ultraviolet rays of 250-320 nm to prevent blotches and freckles in human skin, and to suppress aging of the skin, which comprises 1-25% by weight of fine particulate titanium oxide having an average particle size of 30-70 mμ and 1-25% by weight of fine particulate zinc oxide having an average particle size of 70-300 mμ.
Claim 4
Dependent Claim
77 words
An anti-suntan cosmetic composition for selectively decreasing the transmittance of the UV-A region ultraviolet rays of 320-400 nm and the UV-B region ultraviolet rays of 250-320 nm to prevent blotches and freckles in human skin, and to suppress aging of the skin, which comprises 1-25% by weight of fine particulate titanium oxide having an average particle size of 30-70 mμ and 1-25% by weight of fine particulate zinc oxide having an average particle size of 70-300 mμ.
Claim 5
Dependent Claim
22 words
An anti-suntan cosmetic composition as defined in claim 2, wherein said fine particulate zinc oxide and/or fine particulate titanium oxide is hydrophobicized.
Claim 6
Dependent Claim
23 words
An anti-suntan cosmetic composition as defined in claim 3, wherein said hydrophobicizing treatment is carried out with methyl hydrogen polysiloxane or dimethyl polysiloxane.
Claim 7
Dependent Claim
22 words
An anti-suntan cosmetic composition as defined in claim 2, wherein said fine particulate titanium oxide is in a rutile type crystal form.
Claim 8
Dependent Claim
25 words
An anti-suntan cosmetic composition according to claim 2, wherein said titanium oxide is contained therein in an amount of from 1 to 20% by weight.
References Cited (Backward Citations)
US2175213A
Cited
US3392040A
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US3697642A
Cited
US4431673A
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US4578266A
Cited
JPS60231607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |