Patent US2465754A successfully refreshed from Google Patents.
US4401649A
Expired / Lapsed
US
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Sunscreen method
Assignee: Air Products and Chemicals Inc
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Filing: 1981-07-20
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Granted: 1983-08-30
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Expires: 2001-07-20
Abstract
Abstract Sunscreen compositions are described which comprise a pharmaceutically acceptable carrier having incorporated therein, in an amount effective to provide protection against the harmful effects of ultraviolet radiation, a compound of the formula <IMAGE> wherein X is an alkylene group containing 1 to 7 carbon atoms and the amino group of unspecified position is substituted meta or para to the ester group.
Inventors
- 👤 Milton Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/445
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A method for protecting against the harmful effects of ultraviolet radiation in the range of 290 nanometers to 320 nanometers comprising topically applying a sunscreen composition comprising a pharmaceutically acceptable carrier having incorporated therein, in an amount effective to provide protection against the harmful effects of ultraviolet radiation, a compound of the formula ##STR5## wherein X is an alkylene group containing 3 or 5 carbon atoms, said sunscreen composition being applied to the skin in an amount sufficient to provide said protection.
Claim 2
Independent Claim
82 words
A method for protecting against the harmful effects of ultraviolet radiation in the range of 290 nanometers to 320 nanometers comprising topically applying a sunscreen composition comprising a pharmaceutically acceptable carrier having incorporated therein, in an amount effective to provide protection against the harmful effects of ultraviolet radiation, a compound of the formula ##STR5## wherein X is an alkylene group containing 3 or 5 carbon atoms, said sunscreen composition being applied to the skin in an amount sufficient to provide said protection.
Claim 3
Dependent Claim
24 words
A method of claim 1 wherein said compound is incorporated in said composition in an amount of about 5% to about 50% by weight.
Claim 4
Dependent Claim
24 words
A method of claim 2 wherein said compound is incorporated in said composition in an amount of about 10% to about 30% by weight.
Claim 5
Dependent Claim
13 words
A method of claim 1 wherein said compound is dissolved in said carrier.
Claim 6
Dependent Claim
16 words
A method of claim 4 wherein said carrier comprises, as a solvent for said compound, dimethylsulfoxide.
Claim 7
Dependent Claim
28 words
A method of claim 4 wherein said carrier comprises, as a solvent for said compound, a polyether polyol having a molecular weight of about 400 to about 4000.
Claim 8
Dependent Claim
19 words
A method of claim 6 wherein said polyether polyol has a primary hydroxyl content of about 70% or greater.
Claim 9
Dependent Claim
13 words
A method of claim 1 wherein said compound is of the formula ##STR6##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |