Patent US4457911A successfully refreshed from Google Patents.
US4457911A
Expired / Lapsed
US
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Dialkyl malonates as organic sunscreen adjuvants
Assignee: ISP Van Dyk Inc
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Filing: 1982-08-03
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Granted: 1984-07-03
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Expires: 2002-08-03
Abstract
Abstract Compositions containing an organic sunscreen and particular substituted dialkyl malonates adjuvants therefor are very effective in providing broad spectrum sunscreen protection.
Inventors
- 👤 Donald E. Conner
- 👤 Boris M. Cumpelik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:24
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/37
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A composition adapted for application to the human skin comprising a cosmetic oil carrier containing distributed therein an effective amount to provide substantial protection against erythemal and tanning radiation of an organic sunscreen selected from the group consisting of 2-ethylhexyl para methoxy cinnamate, homomenthyl salicylate, p-amino-benzoic acid and its esters, p-dimethyl amino benzoates, hydroxy and dihydroxy-4-methoxy benzophenones, and a benzalphthalide, and as an adjuvant therefor a dialkyl malonate selected from the group consisting of p-methoxy benzal diethyl malonate, p-methoxy benzal diisobutyl malonate, cinnamal diethyl malonate, indolal diethyl malonate, fural diethyl malonate, and 3,4,5 trimethoxy benzal diethyl malonate.
Claim 2
Dependent Claim
97 words
A composition adapted for application to the human skin comprising a cosmetic oil carrier containing distributed therein an effective amount to provide substantial protection against erythemal and tanning radiation of an organic sunscreen selected from the group consisting of 2-ethylhexyl para methoxy cinnamate, homomenthyl salicylate, p-amino-benzoic acid and its esters, p-dimethyl amino benzoates, hydroxy and dihydroxy-4-methoxy benzophenones, and a benzalphthalide, and as an adjuvant therefor a dialkyl malonate selected from the group consisting of p-methoxy benzal diethyl malonate, p-methoxy benzal diisobutyl malonate, cinnamal diethyl malonate, indolal diethyl malonate, fural diethyl malonate, and 3,4,5 trimethoxy benzal diethyl malonate.
Claim 3
Dependent Claim
13 words
The composition of claim 1 in which the adjuvant is p-methoxy diisobutyl malonate.
Claim 4
Dependent Claim
13 words
The composition of claim 1 in which the adjuvant in cinnamal diethyl malonate.
Claim 5
Dependent Claim
12 words
The composition of claim 1 in which the organic sunscreen is 4-pentoxybenzalphthalide.
Claim 6
Independent Claim
93 words
A method of protecting the human skin from the effects of erythema and tanning radiation in sunlight which comprises applying to said skin an effective sunscreening amount of an organic sunscreen selected from the group consisting of 2-ethylhexyl para methoxy cinnamate, homomenthyl salicylate, p-amino-benzoic acid and its esters, p-dimethylamino benzoates, hydroxy and dihydroxy-4-methoxybenzophenones, and a benzalphthalide, and as an adjuvant therefor a dialkyl malonate selected from the group consisting of p-methoxy benzal diethyl malonate, p-methoxy benzal diisobutyl malonate, cinnamal diethyl malonate, indolal diethyl malonate, fural diethyl malonate, and 3,4,5 trimethoxy benzal diethyl malonate.
Claim 7
Independent Claim
93 words
A method of protecting the human skin from the effects of erythema and tanning radiation in sunlight which comprises applying to said skin an effective sunscreening amount of an organic sunscreen selected from the group consisting of 2-ethylhexyl para methoxy cinnamate, homomenthyl salicylate, p-amino-benzoic acid and its esters, p-dimethylamino benzoates, hydroxy and dihydroxy-4-methoxybenzophenones, and a benzalphthalide, and as an adjuvant therefor a dialkyl malonate selected from the group consisting of p-methoxy benzal diethyl malonate, p-methoxy benzal diisobutyl malonate, cinnamal diethyl malonate, indolal diethyl malonate, fural diethyl malonate, and 3,4,5 trimethoxy benzal diethyl malonate.
Claim 8
Dependent Claim
14 words
The method of claim 5 in which the adjuvant is p-methoxy benzal diisobutyl malonate.
Claim 9
Dependent Claim
13 words
The method of claim 5 in which the adjuvant is cinnamal diethyl malonate.
Claim 10
Dependent Claim
12 words
The method of claim 5 in which the organic sunscreen is 4-pentoxybenzalphthalide.
Claim 11
Dependent Claim
23 words
The composition of claim 3 in which the total amount of sunscreen and adjuvant comprise up to about 10 wt.% of the composition.
References Cited (Backward Citations)
DE110554C
Cited
US3123647A
Cited
DE1087902B
Cited
US3160665A
Cited
US3415875A
Cited
US3670074A
Cited
US3895104A
Cited
JPS5239660A
Cited
DE2604554A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |