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:
Mar. 18, 2003
Filed:
Feb. 14, 2002
Applicant:
Inventors:
Steven G. Wright, Madeira, OH (US);
Michael E. Rickey, Loveland, OH (US);
J. Michael Ramstack, Lebanon, OH (US);
Shawn L. Lyons, Cincinnati, OH (US);
Joyce M. Hotz, Cincinnati, OH (US);
Assignee:
Alkermes Controlled Therapeutics, Inc. II, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K 9/14 ; A61K 9/50 ; B01J 1/302 ;
U.S. Cl.
CPC ...
A61K 9/14 ; A61K 9/50 ; B01J 1/302 ;
Abstract
A method for preparing microparticles having a selected polymer molecular weight. The hold time and temperature of a solution containing a nucleophilic compound and a polymer having a starting molecular weight are controlled in order to control the molecular weight of the polymer in the finished microparticle product. In this manner a selected polymer molecular weight in the finished microparticle product can be achieved from a variety of starting material molecular weights.