Bicyclolactam derivative
CA 2050587 C · Owner: Yasumoto, Mitsugi · Inventors: Satoh, Atsushi; Yasumoto, Mitsugi; Kawaguchi, Akihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a bicyclolactam derivative which has the following formula and is useful as medicaments for treating senile dementia i.e. as cerebral, function improving agents and cerebral metabolism activators or anoxic brain damage protectives, (see fig. 1) wherein R is benzoyl group which may be substituted with halogen atom, lower alkyl group, lower alkoxyl group nitro, group, cyano group or amino group; ~ is 1 or 2; m is 0 or 1; and n is 0, 1 or 2, provided that m and n are not 0 at the same time.
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 January 30, 1991 and granted November 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 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.