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:
Feb. 19, 1991
Filed:
Nov. 10, 1987
Applicant:
Inventors:
Shozo Muranishi, Kyoto, JP;
Yoshito Ikada, Kyoto, JP;
Hiroshi Yoshikawa, Kyoto, JP;
Shokyu Gen, Kyoto, JP;
Assignees:
Sanraku Incorporated, Tokyo, JP;
Biomaterials Universe Incorporated, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H61K / ;
U.S. Cl.
CPC ...
424497 ; 424426 ;
Abstract
Polylactic acid microspheres having an average particle diameter of about 0.1 to 10 .mu.m which are produced from solution containing a physiologically active substance by the solvent-evaporation drying process. The microspheres are produced by emulsifying the solution in a non-solvent by the aid of ultrasonic wave. The microspheres produce a sustained release effect of the physiologically active substance.