Therapeutic system for the transdermal or transmucous administration of active substances and the use thereof
CA 2009558 C · Owner: Roreger, Michael · Inventors: Muller, Walter; Bohnenkamper, Peter; Palm, Heike
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a therapeutic system for the transdermal or transmucous administration of active substances via an impermeable backing layer a reservoir, which at least partially comprises active substance is, double-layered and consists of separate parts and a protec-, tive layer, whereby the two reservoir members (a) are positioned substantially parallely on top of each other, (b) are separated from each other by a removable intermediate layer being impermeable to the active substances of said reservoir members, (c) either comprise active substance or auxiliary agents or both at concentrations not corresponding to the distribution equilibrium.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 8, 1990 and granted August 6, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.