Percutaneous pharmaceutical preparation
CA 2000401 C · Owner: Tsukahara, Hiroko · Inventors: Fukuda, Mutsumi; Tsukahara, Hiroko; Azuma, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A percutaneous pharmaceutical preparation in tape form is provided. The preparation comprises a flexible backing, which is not permeable to an active ingredient, and an adhesive layer formed on the flexible backing, the adhesive layer comprising an adhesive base material and an active ingredient compatible with the adhesive base material wherein the, adhesive base material consists essentially of a copolymer containing 2-ethylhexyl acrylate in a concentration of 45 to 80 mol% and N-vinyl-2-pyrrolidone in a concentration of 20 to 55 mol%, and the active ingredient is estradiol and/or the esters thereof which are contained in a concentration of 6 to 25% by weight of the total amount of the …
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 October 10, 1989 and granted May 28, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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.