Adhesive tape preparation of clonidine
CA 2002761 C · Owner: Otsuka, Saburo · Inventors: Tokuda, Shoichi; Ito, Yuusuke; Otsuka, Saburo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adhesive tape preparation of clonidine is disclosed comprising a polytetrafluoroethylene porous sheet having an air permeability of from 10 to 500 seconds having thereon an active ingredient-containing layer comprising a pressure-sensitive adhesive obtained by copolymerizing a monomer mixture comprising from 40 to 80% by weight of 2-ethylhexyl acrylate from 20 to 60% by weight of 2-methoxyethyl acrylate and 0 to, 40% by weight of vinyl acetate the pressure-sensitive adhesive, containing clonidine as an active ingredient. The preparation achieves sustained release of clonidine and exhibits long-term preservability while minimizing skin irritation and maintaining sufficient adhesion to the …
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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 November 10, 1989 and granted March 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2011.
- 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.