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:
Nov. 28, 1995
Filed:
Feb. 05, 1993
Applicant:
Inventors:
Andreas Supersaxo, Basel, CH;
Jim H Kou, Palo Alto, CA (US);
Assignee:
Syntex (U.S.A.) Inc., Palo Alto, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424489 ; 424422 ; 424426 ; 424493 ;
Abstract
A controlled release pharmaceutical composition comprising a physiologically active agent dispersed in preformed porous polymeric microparticles is provided. The active agent concentration may be up to about 10% by weight to achieve controlled release. Each of the porous microparticles has a plurality of preformed pores into which active agent is loaded and from which the active agent is subsequently released to the environment of use. The compositions are capable of delivering physiologically effective amounts of active agent for at least about thirty days, which delivery may be reversibly controlled by exposure to ultrasound.