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:
Mar. 19, 1996
Filed:
Dec. 21, 1993
Applicant:
Inventors:
Assignee:
Unilever Patent Holdings B.V., Rotterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424451 ; 424489 ; 424490 ; 424492 ;
Abstract
An encapsulation process employs an aqueous dispersion of silica having a particle size not substantially greater than 100 nm. An emulsion is formed by high shear mixing of the silica dispersion with the material to be encapsulated and the emulsion is gelled. The process allows hydrophobic materials to be encapsulated in structures which have a high loading of the material and a good degree of imperviousness in the presence of other materials such as surfactants and mineral oils. Using the process, hydrophobic materials such as flavours, fragrances and cosmetic ingredients can be encapsulated for delayed release in a wide variety of products.