Epoxysuccinamic acid derivatives
CA 2092919 C · Owner: Taisho Pharmaceutical Co. Ltd. · Inventors: Murata, Mitsuo; Hatayama, Katsuo; Sumiya, Shigeyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Epoxysuccinamic acid derivative represented by general formula (I) which is , useful for treating myolysis pharmaceutical-, ly acceptable salt thereof and intermediate therefor, wherein R1 represents C1 to C10 alkyl, phenyl or benzyl.
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 September 27, 1991 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2013.
- 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.