United States Patent 19 11 Patent Number: 5,770,220 Meconi Et Al
USOO5770220A United States Patent 19 11 Patent Number: 5,770,220 Meconi et al. (45) Date of Patent: Jun. 23, 1998 54 ACTIVE SUBSTANCE-CONTAINING PATCH 4,911,707 3/1990 Heiber ..................................... 424/449 4,983,395 1/1991 Chang ..................................... 424/448 75 Inventors: Reinhold Meconi, Neuwied; Frank 5,008,110 4/1991 Benecke .................................. 424/448 Seibertz, Bad Hónningen/Ariendorf, 5,314,694 5/1994 Gale ........................................ 424/448 both of Germany FOREIGN PATENT DOCUMENTS 73 Assignee: LTS Lohmann Therapie Systeme 0208395 1/1987 European Pat. Off. ....... A61M 35/OO GmbH, Neuwied, Germany 3 315 272 3/1986 Germany. 3 503 111 8/1986 Germany. 21 Appl. No.: 640,791 3 522 060 1/1987 Germany. 22 PCT Filed: Nov. 23, 1994 3 843 239 2/1990 Germany. 86 PCT No.: PCT/EP94/03866 Primary Examiner-D. Gabrielle Phelan Attorney, Agent, or Firm Wenderoth, Lind & Ponack S371 Date: Aug. 5, 1996 57 ABSTRACT S 102(e) Date: Aug. 5, 1996 An active Substance-containing patch for the controlled 87 PCT Pub. No.: WO95/15158 release of active Substances, comprising a backing layer, an adjoining active Substance-containing reservoir layer soft PCT Pub. Date:Jun. 8, 1995 ening at body temperature, a membrane controlling the 30 Foreign Application Priority Data active Substance release, a pressure-sensitive adhesive device permitting fixation of the patch to the skin, and a Dec. 4, 1993 DEI Germany .......................... 43 41 444.3 removable protective layer, is characterized by the fact that 51) Int. Cl." ...................................................... A61F 13/02 the reservoir layer which Softens at body temperature is 52 U.S.
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