Patent ID: 9439861
Filing Date: 2016-09-13
CPC Classification: A61B,A61K,A61L,A61P,C08F,C08J,C08L

Claim Text:
1. A method of making microspheres, comprising: preparing an aqueous solution comprising: adding the aqueous solution into a liquid organic phase that has low miscibility in water using a feed system, before or while stirring; thereby producing microspheres comprising a copolymer comprising a N-tris-hydroxymethyl methylacrylamide monomer unit, a diethylaminoethylacrylamide monomer unit and a N,N-methylene-bis-acrylamide monomer unit; wherein the feed system comprises feed equipment that is disposed in the liquid organic phase, and wherein the aqueous solution is passed through the feed equipment and infected into the liquid organic phase; and crosslinking the gelatin.