Therapeutic system for the retarded and controlled transdermal or transmucous administration of active substances
CA 2010218 C · Owner: Lts Lohmann Therapie-Systeme Gmbh & Co. Kg · Inventors: Muller, Walter
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 retarded and controlled transdermal or transmucous administration of active substances via an impermeable backing layer, an auxiliary agents containing reservoir, an active substance containing reservoir and a removable protective layer, characterized in that a. the active substance reservoir comprises the active substance in a non-bioavailable form b. the auxiliary agent of the auxiliary agent reservoir renders the active substance bioavailable and, c. auxiliary agent reservoir and active substance reservoir are brought into contact just immediately prior to application or at any time after application, this being done in such a …
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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 16, 1990 and granted April 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 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.