Therapeutic agent for ischemic diseases
CA 2038527 A1 · Owner: Fujisawa Pharmaceutical Co. Ltd. · Inventors: Takasugi, Hisashi; Kato, Masayuki; Ito, Kiyotaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula:, wherein R1 is hydrogen lower alkyl, lower, alkenyl or N,N-di(lower)alkylaminome-thyl R2 is hydrogen, lower alkyl or, halogen R3 is imidazolyl or pyridyl, each of, which may have suitable substituent(s) and, R4 is hydrogen, lower alkyl, lower alkenyl or hydroxy(lower)alkyl and R5 is hydrogen hydroxy or acyloxy, or, R4 and R5 are linked together to form an additional bond, or pharmaceutically acceptable salts thereof, and their use for treating ischemic diseases. The preparation of these compounds is also disclosed as well as pharmaceutical preparations containing same.
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 March 18, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 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.