Nitrone derivatives
CA 2265053 A1 · Owner: Tatsuno, Tohru · Inventors: Tatsuno, Tohru; Nagata, Ryu; Ogo, Hiroki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound represented by the figure (1) or a pharmaceutically acceptable salt thereof is useful as a medicament for treating retinal degenerative disorders:, (see fig. I) wherein Ar is optionally substituted phenyl or optionally substituted heteroaryl;. n is 0, 1 or 2;, W is -CH2NH- or -CH=N(0)-; R1, R2 and R3 are independently optionally substituted alkyl carboxyl or alkoxycarbonyl; any two groups of R1 R2 and R3 may be, taken together with the carbon atom to form optionally substituted cycloalkane; all of R1, R2 and R3 may be taken together with the adjusent carbon atom to form optionally substituted bicycloalkane or optionally substituted tricycloalkane; R4 and R5 are independently …
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 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2019.
- 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.