Patent ID: 6207181
Filing Date: 2001-03-27
Classification: A61F,A61K

Abstract:
A transdermal therapeutic apparatus, the apparatus comprising at least one reservoir for controlled transdermal delivery of at least one active substance through a delivery surface, wherein the active substance is active in human and veterinary medicine, cosmetic or pest control; wherein the delivery surface is a pressure sensitive adhesive; wherein the amount of active substance delivered is controlled in geometrically planned, time-dependent manner by a geometrically shaped reservoir for the active substance by which at least one cross-sectional surface of the reservoir taken parallel to the delivery surface is smaller in area than the area of the delivery surface, wherein the delivery surface has a maximum extension in one direction up to 100 times the extension in the direction at right angles thereto and wherein the geometrically shaped reservoir is provided with a geometric shape selected from the group consisting of a cone, truncated cone, pyramid, truncated pyramid, hemisphere, tent-shaped, stepped cylinder and cylinder for producing delivery of the active substance which is a function of time dependent upon the geometry of the geometrically shaped reservoir.