Patent ID: 6808739
Filing Date: 2004-10-26
Classification: A61K,A61P,B01D,F26B

Abstract:
A method of selectively removing volatile components from a composition, comprising:coating a coating formulation onto a first substrate surface of a substrate, wherein the coating formulation comprises solvent, one or more volatile ingredients selected from the group consisting of liquid drugs, liquid excipients and mixtures thereof, and if the volatile ingredient is not therapeutically active, one or more drugs, positioning at least a portion of the coated substrate between a condensing surface having a condensing surface temperature and a heating surface having a heating surface temperature that is greater than the condensing surface temperature, wherein the condensing surface is in a spaced apart, confronting relationship to the coated surface of the substrate and wherein the heated surface is in thermal contact with a second substrate surface opposite the first substrate surface; and wherein the heated surface temperature and the condensing surface temperature are such that the positioning causes the solvent to be selectively removed from the portion of the coated substrate.