Method of making porous microspheres with geometric standard...

Details Method of making porous microspheres with geometric standard... Method of making porous microspheres with geometric standard...

2005-05-20

2008-11-11

Le, H. T (Department: 1794)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C521S065000, C521S069000

Reexamination Certificate

active

07449505

ABSTRACT:
Porous polymer microspheres having a size of from about 3 to about 50 microns and a geometric standard deviation of about 1.25 or less are disclosed. The porous polymer microspheres are made by a method including the steps of preparing an emulsion comprised of polymer particles having an average particle size of less than about 3 microns and a diluent, subjecting the emulsion to an aggregating condition to form aggregated polymer particles, optionally coalescing the aggregated polymer particles, and removing the diluent to form the porous polymer microspheres.

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patent: 7279261 (2007-10-01), Lee et al.

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