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:
Jan. 04, 1994
Filed:
Dec. 27, 1990
Applicant:
Inventor:
Nienyuan J Chang, Irvine, CA (US);
Assignee:
Allergan, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
424426 ; 424428 ; 424433 ; 424434 ; 424435 ; 424436 ; 424486 ; 424497 ; 514912 ; 514913 ; 514914 ; 5147721 ; 5147725 ; 5147726 ; 514952 ; 427-3 ; 427212 ;
Abstract
Sustained release pharmaceutical compound delivery compositions and methods for their production are disclosed wherein ion exchange resin particles are loaded with releasably bound pharmaceutical compounds prior to incorporation in an erodible polymeric matrix to form microparticulates. The microparticulates are suspended in a fluid medium where the encapsulating polymeric matrix shields the drug loaded ion exchange resin from solvent interaction. Administration to a target tissue site initiations erosion of the polymer matrix and release of the loaded pharmaceutical compound.