Indenoindole compounds
CA 2094024 A1 · Owner: University Of Bath · Inventors: Sainsbury, Malcolm; Shertzer, Howard G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cis-fused compounds of formula (I) wherein R is methoxy or ethoxy, when R is methoxy, R1 is methyl and R2 and R3 are both hydrogen or both methyl, and when R is ethoxy R1 is hydrogen and, R2 and R3 are both methyl and enantiomers and salts thereof, are new and useful as antioxidants within the medical and non, medical field.
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 October 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.