US4387089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane
Assignee: DSM Nutritional Products LLC
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Filing: 1981-05-18
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Granted: 1983-06-07
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Expires: 2001-05-18
Abstract
Abstract The novel 4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane is useful as a sunscreen agent. It exhibits outstanding UV-A absorbing qualities in that it brings about a considerable retardation in the ageing of the skin with excellent skin tolerance and stability (light, heat and moisture). 4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane furthermore improves the protective action of UV B-filters, i.e. of substances which absorb the erythema-producing UV B-radiation in the range of about 290 to 320 mm.
Inventors
- 👤 Karl-Fred De Polo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:14
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; A61K8/37; C; C07; C07C; C07C45/00; C07C45/45; C07C45/455; C07C49/00; C07C49/76; C07C49/84
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
1 words
4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane.
Claim 2
Dependent Claim
1 words
4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane.
Claim 3
Dependent Claim
19 words
A light-screen composition comprising an effective ultra violet absorbing amount of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane and at least one other organic material.
Claim 4
Dependent Claim
19 words
A light-screen composition comprising an effective ultra violet absorbing amount of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane and at least one other organic material.
Claim 5
Dependent Claim
15 words
A light-screen composition according to claim 2 which contains 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane in combination with UV B-filter.
Claim 6
Dependent Claim
23 words
A light-screen composition according to claim 2 or claim 3, wherein about 1 wt. % to 6 wt. % of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane is present.
Claim 7
Dependent Claim
24 words
A sun-screen composition comprising 2 wt. % to 5 wt. % of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane and 2.0 wt. % to 10.0 wt. % of 2-ethylhexyl p-methoxycinnamate.
Claim 8
Dependent Claim
24 words
A sun-screen composition comprising 2 wt. % to 5 wt. % of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane and 2.0 wt. % to 10.0 wt. % of 2-ethylhexyl p-methoxycinnamate.
Claim 9
Independent Claim
16 words
A method for preparing a light screening composition which comprises incorporating 4-(1,1-dimethylethyl-4'-methoxydibenzoylmethane into a cosmetic base.
Claim 10
Independent Claim
16 words
A method for preparing a light screening composition which comprises incorporating 4-(1,1-dimethylethyl-4'-methoxydibenzoylmethane into a cosmetic base.
Claim 11
Dependent Claim
22 words
The method of claim 6 wherein the amount of 4-(1,1-dimethylethyl-4'-methoxydibenzoylmethane incorporated is between 1% and 6% by weight of the total composition.
Claim 12
Dependent Claim
13 words
The method of claim 6 wherein there is also incorporated a UV B-filter.
Claim 13
Dependent Claim
17 words
The method of claim 7 wherein there is also incorporated 1% to 12% by weight of 2-ethylhexyl-p-methoxycinnamate.
Claim 14
Dependent Claim
23 words
A topical preparation for application on the skin which comprises an effective amount of 4(1,1-dimethyl)-4'-methoxydibenzoylmethane as a UV-A absorber in a suitable carrier.
Claim 15
Dependent Claim
23 words
A topical preparation for application on the skin which comprises an effective amount of 4(1,1-dimethyl)-4'-methoxydibenzoylmethane as a UV-A absorber in a suitable carrier.
Claim 16
Dependent Claim
13 words
The preparation of claim 10 wherein the carrier is a suitable cosmetic base.
Claim 17
Dependent Claim
23 words
The preparation of claims 10 or 11 wherein the 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane is present at a level of 1% by weight to 6% by weight.
Claim 18
Dependent Claim
42 words
The preparation of claims 10 or 11 wherein the 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane is present at a level of 2% by weight to 5% by weight and wherein there is also present 2-ethylhexyl p-methoxycinnamate at a level of 2% by weight to 10% by weight.
Claim 19
Independent Claim
32 words
A method for protecting the skin from the effects of U.V.-A radiation which comprises applying to the skin an effective amount of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane in a carrier suitable for application on the skin.
Claim 20
Independent Claim
32 words
A method for protecting the skin from the effects of U.V.-A radiation which comprises applying to the skin an effective amount of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane in a carrier suitable for application on the skin.
Claim 21
Dependent Claim
13 words
A method according to claim 14 wherein the carrier is a cosmetic base.
Claim 22
Independent Claim
35 words
The method of claims 14 or 15 wherein the 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane is applied as part of a formulation wherein it is present at a concentration of 1% by weight to 6% by weight of the formulation.
Claim 23
Independent Claim
51 words
The method of claims 14 or 15 wherein the 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane is applied as part of a formulation wherein it is present at a concentration of 2% by weight to 5% by weight and wherein there is also present 2-ethylhexyl p-methoxycinnamate at a level of 2% by weight to 10% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |