Patch containing fentanyl for mucous membrane of oral cavity
CA 2493604 C · Owner: Teikoku Seiyaku Co. Ltd. · Inventors: Nagata, Mitsuhiro; Inazuki, Sayoko; Ihara, Katsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a patch containing fentanyl for mucous membrane of the oral cavity (oral transmucosal fentanyl), which rapidly increases the serum concentration of the drug, is easy to handle and has superior safety. There is provided a patch containing fentanyl for mucous membrane of the oral cavity, which can be prepared by laminating on one side of a drug layer which contains fentanyl or its salt as an active ingredient methyl vinyl , ether-maleic anhydride copolymer as an adhesive and at least one , substance selected from the group consisting of hydroxypropylcellulose, hydroxypropylmethylcellulose and hydroxyethylcellulose as a thickener, a support layer hardly …
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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 June 1, 2004 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2026.
- 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.