Patent US3920834A successfully refreshed from Google Patents.
US3920834A
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Light-screening compositions and method
Assignee: F Hoffmann La Roche AG
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Filing: 1973-09-11
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Granted: 1975-11-18
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Expires: 1993-09-11
Abstract
Abstract Oral compositions for the treatment of erythema caused by the sun utilizing as the active ingredient canthaxanthin in combination with other carotenoids are disclosed.
Inventors
- 👤 Heinrich Klaui
- 👤 Wilheim Friedrich Korner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:43
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/04; A61K; A61K8/00; A61K8/02; A61K8/18; A61K8/30; A61K8/31; A61K8/33; A61K8/35; A61K2800/00; A61K2800/40; A61K2800/59
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
A METHOD FOR THE PROPHYLACTIC TREATMENT OF SUN ERYTHEMA, SUNBURN AND PHOTOSENSITIVITY CAUSED BY ULTRAVIOLET LIGHT RAYS WHICH COMPRISES ORALLY ADMINISTERING TO A PERSON IN NEED OF SUCH TREATMENT AN ORAL COMPOSITION COMPRISING A. PHARMACEUTICALLY ACCEPTABLE CARRIERS AND EXCIPIENTS OR MIXTURES THEREOF, AND B. FROM ABOUT 5 MG. TO ABOUT 50MG. OF A MIXTURE CONTAINING FROM ABOUT 50% TO 75% BY WEIGHT OF CANTHAXANTHIN AND FROM ABOUT 25% TO 50% BY WEIGHT OF A CAROTENOID SELECTED FROM THE GROUP CONSISTING OF B-CAROTENE, B-APO-8''CAROTENAL, B-APO-8''-CAROTENIC ACID ETHYL ESTER, BIXIN, ZEAXANTHIN, CROCETIN AND CITRANAXANTHIN, FOR A PERIOD OF FROM ABOUT 10 TO ABOUT 20 DAYS PRIOR TO EXPECTED EXPOSURE TO SUNLIGHT.
Claim 2
Independent Claim
109 words
A METHOD FOR THE PROPHYLACTIC TREATMENT OF SUN ERYTHEMA, SUNBURN AND PHOTOSENSITIVITY CAUSED BY ULTRAVIOLET LIGHT RAYS WHICH COMPRISES ORALLY ADMINISTERING TO A PERSON IN NEED OF SUCH TREATMENT AN ORAL COMPOSITION COMPRISING A. PHARMACEUTICALLY ACCEPTABLE CARRIERS AND EXCIPIENTS OR MIXTURES THEREOF, AND B. FROM ABOUT 5 MG. TO ABOUT 50MG. OF A MIXTURE CONTAINING FROM ABOUT 50% TO 75% BY WEIGHT OF CANTHAXANTHIN AND FROM ABOUT 25% TO 50% BY WEIGHT OF A CAROTENOID SELECTED FROM THE GROUP CONSISTING OF B-CAROTENE, B-APO-8''CAROTENAL, B-APO-8''-CAROTENIC ACID ETHYL ESTER, BIXIN, ZEAXANTHIN, CROCETIN AND CITRANAXANTHIN, FOR A PERIOD OF FROM ABOUT 10 TO ABOUT 20 DAYS PRIOR TO EXPECTED EXPOSURE TO SUNLIGHT.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein component (b) is a mixture containing canthaxanthin and Beta -carotene.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein component (b) is a mixture containing canthaxanthin and Beta -apo-8''-carotenal.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein component (b) is a mixture containing canthaxanthin and Beta -apo-8''-carotenoic acid ethyl ester.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein component (b) is a mixture containing canthaxanthin and citranaxanthin.
References Cited (Backward Citations)
US3252864A
Cited
US3252865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |