US4988501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sunscreen composition
Assignee: Zeneca Inc
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Filing: 1990-03-19
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Granted: 1991-01-29
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Expires: 2010-03-19
Abstract
Abstract Sunscreen compositions comprising at least one bis-1,3-diketone derivatives of benzene and a cosmetically acceptable carrier are described. Also disclosed is a method of protecting human skin from the harmful effects of ultraviolet radiation employing such sunscreen composition.
Inventors
- 👤 Donald J. Gosciniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:19
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; C; C08; C08K; C08K5/00; C08K5/04; C08K5/07
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
46 words
A sunscreen composition comprising: (A) an effective amount of a compound having the structure: ##STR16## wherein: R and R 1 are each independently C 2 -C 10 linear or branched alkyl; and Z is a bivalent phenylene having the structure ##STR17## (B) a cosmetically acceptable carrier.
Claim 2
Dependent Claim
46 words
A sunscreen composition comprising: (A) an effective amount of a compound having the structure: ##STR16## wherein: R and R 1 are each independently C 2 -C 10 linear or branched alkyl; and Z is a bivalent phenylene having the structure ##STR17## (B) a cosmetically acceptable carrier.
Claim 3
Dependent Claim
14 words
A sunscreen composition in accordance with claim 1 wherein Z is a bivalent 1,4-phenylene.
Claim 4
Dependent Claim
22 words
A sunscreen composition in accordance with claim 2 wherein R and R 1 are each independently C 3 -C 10 branched alkyl.
Claim 5
Dependent Claim
27 words
A sunscreen composition in accordance with claim 3 wherein R and R 1 are each independently C 3 -C 9 alkyl which are branched in the alpha-position.
Claim 6
Dependent Claim
25 words
A sunscreen composition in accordance with claim 4 wherein R and R 1 are each independently selected from the groups consisting of tert-butyl and isopropyl.
Claim 7
Dependent Claim
39 words
A sunscreen composition in accordance with claim 1 wherein said cosmetically acceptable carrier is based upon at least one member selected from the group consisting of the group consisting of hydrocarbon oils, vegetable oils, animal oils, fats and waxes.
Claim 8
Dependent Claim
22 words
A sunscreen composition in accordance with claim 1 wherein said composition further comprises an additional UV-absorbing compound in the 280-400 nm range.
Claim 9
Independent Claim
63 words
A method of protecting human skin against an overdose of ultraviolet radiation comprising coating the skin with an effective amount of a sunscreen composition comprising: (A) A compound having the structure: ##STR18## wherein: R and R 1 are each independently C 2 -C 10 linear or branched alkyl; and Z is a bivalent phenylene having the structure: ##STR19## (B) a cosmetically acceptable carrier.
Claim 10
Independent Claim
63 words
A method of protecting human skin against an overdose of ultraviolet radiation comprising coating the skin with an effective amount of a sunscreen composition comprising: (A) A compound having the structure: ##STR18## wherein: R and R 1 are each independently C 2 -C 10 linear or branched alkyl; and Z is a bivalent phenylene having the structure: ##STR19## (B) a cosmetically acceptable carrier.
Claim 11
Dependent Claim
14 words
A method in accordance with claim 8 of wherein Z is a bivalent 1,4-phenylene.
Claim 12
Dependent Claim
21 words
A method in accordance with claim 9 wherein R and R 1 are each independently C 3 -C 10 branched alkyl.
Claim 13
Dependent Claim
26 words
A method in accordance with claim 10 wherein R and R 1 are each independently C 3 -C 9 alkyl which are branched in the alpha-position.
Claim 14
Dependent Claim
24 words
A method in accordance with claim 11 wherein R and R 1 are each independently selected from the group consisting of tert-butyl and isopropyl.
Claim 15
Dependent Claim
38 words
A method in accordance with claim 7 wherein said cosmetically acceptable carrier is based upon at least one member selected from the group consisting of the group consisting of hydrocarbon oils, vegetable oils, animal oils, fats and waxes.
Claim 16
Dependent Claim
21 words
A method in accordance with claim 7 wherein said composition further comprises an additional UV-absorbing compound in the 280-400 nm range.
References Cited (Backward Citations)
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Cited
US4489057A
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US4157350A
Cited
US4387089A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |