Patches containing tulobuterol
CA 2494568 C · Owner: Yamaji, Masahiro · Inventors: Naruse, Mamoru; Yamaji, Masahiro; Yoshimoto, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a patch containing tulobuterol in a low concentration and having stable release-controllability prepared by , laminating an adhesive layer consisting of a rubber an adhesive resin and a , plasticizer on a backing wherein 1 to 4 w/w % of tulobuterol in the lower concentration as an active ingredient and 0.1 to 3 w/w % of a higher fatty acid as a drug-releasing controlling agent are contained in the adhesive layer.
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 June 16, 2004 and granted August 14, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 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.