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:
Aug. 19, 1980
Filed:
Jul. 31, 1978
Applicant:
Inventors:
Masayoshi Samejima, Minoh, JP;
Goichi Hirata, Hirakata, JP;
Assignee:
Tanabe Seiyaku Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
252316 ; 424 19 ; 424 35 ; 424258 ; 424263 ; 424280 ;
Abstract
A process for the preparation of pharmaceutical substance-containing microcapsules by liquid-liquid phase separation is disclosed. In this process, ethyl cellulose having an ethoxy content of about 48 to about 49.5% by weight is used as a wall-forming agent and polyisobutylene is used as a phase separation inducing agent, and both or either one of the ethyl cellulose and polyisobutylene are used in the form of a mixture of two kinds differing in the average molecular weight.