Percutaneously absorbable preparation
CA 2176824 A1 · Owner: Wakiya, Takeshi · Inventors: Kuroda, Hiroshi; Hashimoto, Masaki; Kitamura, Mikiya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The first percutaneous pharmaceutical preparation of the present invention comprises a base material one or, more active ingredients selected from a group consisting of 3-ketodesogestrel and its 17-esters and/or one or more, active ingredients selected from a group consisting of 17- .beta.-estradiol and its esters. The second percutaneous pharmaceutical preparation of the present invention is composed of a backing layer and an adhesive base layer laminated on one surface of the backing layer, in which the adhesive base layer comprises an adhesive, one or more active ingredients selected from a group consisting of 3-ketodesogestrel and its 17-esters and/or one or more active ingredients …
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 December 26, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2016.
- 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.