Patch and production method thereof
CA 2425231 C · Owner: Hori, Mitsuhiko · Inventors: Nakano, Yoshihisa; Matsuoka, Kensuke; Hori, Mitsuhiko
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 patch containing a substrate a non-crosslinked adhesive layer (A) containing a drug laminated on one surface of the substrate and a crosslinked adhesive layer (B) laminated on the adhesive layer (A). According to the present invention the percutaneous absorbability of the drug can be improved and a patch free of problems such as adhesive residue and adhesive bleed can be provided.
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 April 11, 2003 and granted January 25, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2025.
- 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.