Neurotrophin potentiators
CA 2370721 A1 · Owner: Fujii, Miyuki · Inventors: Isono, Fujio; Fujii, Miyuki; Aoyagi, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Neurotrophin potentiators which contain 6(5H)-phenanthridinone derivatives of general formula (I) or pharmacologically acceptable salts thereof and are useful as preventive or therapeutic drugs for nerve degeneration diseases: wherein R1, R1', R2 and R2' are each independently hydrogen or halogeno; and either of R3 and R3' is amino and the other hydrogen with the provisos that , when either of R1 and R1' is halogeno the other is hydrogen and that when , either of R2 and R2' is halogeno the other is hydrogen.
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 April 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2022.
- 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.