Porous particles, their aqueous dispersions, and method of...

Details Porous particles, their aqueous dispersions, and method of... Porous particles, their aqueous dispersions, and method of...

2005-05-24

2005-05-24

Page, Thurman K. (Department: 1615)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

Reexamination Certificate

active

06896905

ABSTRACT:
A method of forming, by polymerization in an aqueous dispersion at pressures in excess of one atmosphere, a plurality of porous particles having at least one polymeric phase and at least one pore filling phase, wherein the pore filling phase includes a pore filler and a fugitive substance, is disclosed. Replacement of the fugitive substance with a replacement gas is further disclosed. Porous particles having a polymeric phase and pores containing a pore filler, and, optionally, a gaseous phase are also disclosed, as are their aqueous dispersions.

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