Preparation process of acemetacin
CA 1331602 C · Owner: Kikugawa, Yasuo · Inventors: Kyotani, Yoshinori; Kikugawa, Yasuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing acemetacin which process comprises removing a protecting group, which is other than tetrahydropyranyl group and is removable under acidic conditions, from an acemetacin ester represented by the formula, whrein R means the protecting group under the acidic, conditions.
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
- Granted August 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 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.