Female hormone-containing patch
CA 2494915 C · Owner: Sugawara, Takaya · Inventors: Sugawara, Takaya; Yamaji, Masahiro; Shirai, Sadanobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided herein is a female hormone-containing patch wherein an active ingredient is highly soluble in a pressure-sensitive adhesive layer and the active ingredient is not adsorbed to a backing, and the patch per se can follow the irregularities on the skin surface or body movements. The patch is an external patch containing, as a female hormone, a follicular hormone estradiol and/or its derivative or a progestational hormone norethisterone and/or its derivative. The external patch comprises an acrylic pressure-sensitive adhesive containing 0.01 to 1% by weight of an isocyanate-based crosslinking agent as an essential ingredient.
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 August 7, 2003 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.