Neuroprotectant agents
CA 2101933 A1 · Owner: Podlesny, Edward J. · Inventors: Childers, Wayne E. Jr.; Podlesny, Edward J.; Abou-Gharbia, Magid A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention involves novel neuroprotectant agents of formula (I), in which R1 and R3 are, independently hydrogen, cyano, nitro, halo or perhaloalkyl with the proviso that one of R1 and, R3 is other than hydrogen; R2 is alkyl; or a pharmaceutically acceptable salt thereof processes for preparing them, compositions containing them and their use as NMDA antagonists.
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 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2014.
- 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.