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:
Oct. 06, 1992
Filed:
Jun. 21, 1990
Hans G Weder, CH-8800 Thalwil, CH;
Matthias Mutsch, Zurich, CH;
Other;
Abstract
An aqueous phase, an oil of a triglyceride or fatty acid ester, and, per part by weight of oil 0.05 to 0.4 part by weight of an amphoteric emulsifier are mixed together and processed in a high-pressure homogenizer into a nanoemulsion of less than 200 nm sized oil particles. The emulsifier, exhibiting in the aqueous phase a lamellar liquid-crystalline structure, is preferably a glycerophosphatide of the formula: ##STR1## wherein, R.sub.1 and R.sub.2 mean acyloxy and/or alkyl or alkenyl ether. R.sub.3 is a tri-lower-alkyl ammonio or amino-substituted lower alkyl. The resultant nanoemulsion is stable for a period of several months and does not contain any toxic emulsifier materials. Therefore, it can be advantageously utilized as a vehicle for active agents, for example medicines and/or cosmetic ingredients.