Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2005-03-18
2009-11-03
Menon, Krishnan S (Department: 1797)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S321600, C210S321740, C210S634000, C422S105000, C436S809000
Reexamination Certificate
active
07611630
ABSTRACT:
A membrane-permeation test for evaluating pharmaceutical compositions is described. The method comprises the following steps: (1) providing a microporous membrane having a plurality of pores, the membrane having a feed side and a permeate side, wherein the feed side of the membrane is in fluid communication with the feed solution, and wherein the permeate side of the membrane is in fluid communication with a permeate solution; (2) administering a pharmaceutical composition to an aqueous solution to form a feed solution; and (3) measuring the concentration of drug in the permeate solution; wherein the feed side of the membrane is hydrophilic, and/or wherein the permeate solution comprises an organic fluid.
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Babcock Walter Christian
Friesen Dwayne Thomas
McCray Scott Baldwin
Bend Research Inc.
Chernoff Vilhauer McClung & Stenzel LLP
Menon Krishnan S
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