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:
Jul. 13, 1999
Filed:
May. 18, 1995
Applicant:
Inventors:
Paul F Herbert, Wayland, MA (US);
Michael S Healy, East Bridgewater, MA (US);
Assignee:
Alkermes Controlled Therapeutics, Inc., Cambridge, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
264-5 ; 264 13 ;
Abstract
The present invention relates to a method for forming microparticles of a material from microdroplets of a solution, wherein the solution comprises the material dissolved in a solvent. The method includes the steps of directing the microdroplets into a freezing zone, whereby the microdroplets freeze. The frozen microdroplets are then contacted with a liquid non-solvent to extract the solvent into the non-solvent, thereby forming the microparticles.