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US5658556A
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Cosmetic or dermatological preparations comprising hydrophobicized inorganic pigments for preserving the urocaninic acid state of the skin
Assignee: Beiersdorf AG
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Filing: 1995-08-15
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Granted: 1997-08-19
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Expires: 2015-08-15
Abstract
Abstract Use of one or more hydrophobicized, pharmaceutically or cosmetically acceptable inorganic pigments in cosmetic or dermatological preparations for preventing leaching out or washing off of the skin's cis- or trans-urocaninic acid from the human skin, caused by the action of water, or leaching out or washing off of cis- or trans-urocaninic acid which has been applied artificially to the skin, from the human skin caused by the action of water.
Inventors
- 👤 Heinrich Gers-Barlag
- 👤 Sabine Schulz
- 👤 Beate Uhlmann
- 👤 Ulrich Hintze
- 👤 Robert Schmucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:53
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/29; A61K8/30; A61K8/49; A61K8/494; A61K8/4946; A61P; A61P17/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
In the method of preserving the urocaninic acid state of the skin by preventing the leaching out or washing off of the skin's cis- or trans-urocaninic acid from the human skin, caused by the action of water, or the leaching out or washing off of the skin's cis- or trans-urocaninic acid, which has been applied artificially to the skin, from the human skin caused by the action of water, the improvement which comprises applying to said skin a cosmetic or dermatological preparation containing a hydrophobicized pharmaceutically or cosmetically acceptable pigment, wherein the pigment is an inorganic metal oxide pigment or a mixture of inorganic metal oxide pigments wherein said metal is selected from the group consisting of titanium, zinc, iron, zirconium, silicon, manganese, aluminum and cerium.
Claim 2
Dependent Claim
126 words
In the method of preserving the urocaninic acid state of the skin by preventing the leaching out or washing off of the skin's cis- or trans-urocaninic acid from the human skin, caused by the action of water, or the leaching out or washing off of the skin's cis- or trans-urocaninic acid, which has been applied artificially to the skin, from the human skin caused by the action of water, the improvement which comprises applying to said skin a cosmetic or dermatological preparation containing a hydrophobicized pharmaceutically or cosmetically acceptable pigment, wherein the pigment is an inorganic metal oxide pigment or a mixture of inorganic metal oxide pigments wherein said metal is selected from the group consisting of titanium, zinc, iron, zirconium, silicon, manganese, aluminum and cerium.
Claim 3
Dependent Claim
43 words
The method according to claim 1, wherein the pigment is selected from the group consisting of TiO 2 , ZnO, an iron oxide, ZrO 2 , SiO 2 , a maganese oxide, Al 2 O 3 , a cerium oxide and mixtures thereof.
Claim 4
Dependent Claim
26 words
The method according to claim 1, wherein the preparation comprises 0.01% to 30% by weight based upon the total weight of the formulation of inorganic pigments.
Claim 5
Dependent Claim
25 words
The method according to claim 1, wherein the preparation comprises 0.1% to 6% by weight, based upon total weight of the formulation, of inorganic pigments.
Claim 6
Dependent Claim
26 words
The method according to claim 1, wherein the preparation additionally comprises 0.00001 mg/ml to 60 mg/ml of urocaninic acid, based upon total volume of the preparation.
Claim 7
Dependent Claim
26 words
The method according to claim 1, wherein the preparation additionally comprises 0.05 mg/ml to 1.0 mg/ml of urocaninic acid, based upon total volume of the preparation.
Claim 8
Dependent Claim
14 words
The method according to claim 1, wherein the preparation is a sun screen preparation.
Claim 9
Dependent Claim
13 words
The method according to claim 1, wherein the preparation is a bath oil.
References Cited (Backward Citations)
US5455036A
Cited
US5494676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |