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:
Sep. 19, 2000
Filed:
May. 31, 1995
Applicant:
Inventors:
Assignee:
Rhone-Poulenc Rorer SA, Anthony Cedex, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424489 ; 424499 ; 424500 ; 424501 ; 424502 ; 261-41 ; 261-43 ;
Abstract
Biocompatible microspheres containing one or more active principals, a biodegradable and biocompatible polymer and a surface-active agent which is also biodegradable and biocompatible, contain less than 10 ppm of heavy metals. These microspheres are prepared by providing a solution of the polymer and of the active principal in a water-immiscible solvent which is more volatile than water and mixing with an aqueous solution of the surface-active agent, followed by evaporation of the solvent.