Patent ID: 6063365
Filing Date: 2000-05-16
Classification: A61L,Y10S,Y10T

Abstract:
microns, said polymeric film having entrapped and dissolved therein molecules of at least one fragrance substance in an initial weight ratio R.sub.i of fragrance:polymer of from about 0.01:20 up to about 50:0.01, said fragrance substance being:(i) capable of evolving from within the polymeric film through said first laminar polymer surface into the environment proximate to and above said first laminar polymer surface by means of substantially steady state molecular diffusion at a substantially constant permeation rate of from about 1.times.10.sup.-7 up to about ##EQU34## in a sustained and controlled release manner; and (ii) substantially incapable of permeating that portion of said second laminar polymer surface which is juxtaposed with the surface of said planar solid or semi-solid support,said polymeric film having two regions located across the cross-section of said polymeric film, taken along the directional vector from said first laminar polymer surface to said second laminar polymer surface:(a) a first permeation region proximate and immediately adjacent to said first laminar polymer surface; andPA