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. 19, 2002
Filed:
Jun. 06, 2000
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 ...
A61K 9/14 ; A61K 9/16 ; B01J 2/04 ; B01J 2/06 ; B29B 9/02 ;
U.S. Cl.
CPC ...
A61K 9/14 ; A61K 9/16 ; B01J 2/04 ; B01J 2/06 ; B29B 9/02 ;
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, wherein the freezing zone is surrounded by a liquified gas, and wherein the microdroplets freeze. The frozen microdroplets are then mixed with a liquid non-solvent, whereby the solvent is extracted into the non-solvent, thereby forming the microparticles.