Use of acetylsalicylic acid for the treatment of hemorrhoidal disease
CA 2515259 C · Owner: Kawabata, Seiichiro · Inventors: Kawada, Mitsuhiro; Inamoto, Yukiko; Kawabata, Seiichiro
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 an external preparation containing acetylsalicylic acid or its pharmaceutically acceptable salt as an active ingredient for treating anal diseases. The preparation has therapeutic activity on hemorrhoids (internal hemorrhoid external , hemorrhoid), hemorroidal disease owing to anal fissure and other anal diseases together with activity on pain and pruritus.
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 February 17, 2004 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 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.