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:
Jul. 19, 1983
Filed:
Apr. 10, 1981
Applicant:
Inventor:
Joseph A Scarpelli, Dayton, OH (US);
Assignee:
Eurand America, Inc., Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
64-432 ; 71DI / ; 25217413 ; 252543 ; 252D / ; 424 35 ; 424 37 ; 424 70 ;
Abstract
Microcapsules are prepared en masse which contain a substantially water-insoluble core and, incorporated at their surface under a thin film of hydrophilic polymeric colloid, a substantially water insoluble finely divided additive. In the preparation, a primary microcapsule is made in an aqueous vehicle to surround the water-insoluble core, the finely divided additive is then added under stirring to form a fine dispersion and cationic hydrophilic polymeric colloid solution is added to cause the colloid to envelop the additive and deposit it on the capsule wall under a thin film.