The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1999
Filed:
Mar. 06, 1997
Pascal Simon, Vitry Sur Seine, FR;
Didier Gagnebien, Westfield, NJ (US);
L'Oreal, Paris, FR;
Abstract
The present invention relates to a stable fluid water-in-oil emulsion, in particular a topical emulsion, comprising, as gelling agent, a polysaccharide alkyl ether formed from units containing at least two different monosaccharide rings, each unit containing at least one hydroxyl group substituted by a saturated hydrocarbon alkyl chain. The polysaccharide alkyl ether preferably has a weight average molecular weight greater than 200,000 and preferably is a guar gum alkyl ether having a degree of substitution of approximately 2 to 3. The emulsion obtained is stable, even in the absence of an electrolyte or a fatty substance commonly used to stabilize water-in-oil emulsions. It can in particular contain an active ingredient sensitive to electrolytes. The emulsion according to the invention can be used in particular in the cosmetics and/or dermatological fields.