6-oxoazepinoindole compounds, processes and intermediates for their preparation and pharmaceutical compositions containing them
CA 2075102 A1 · Owner: Benson, Werner · Inventors: Benson, Werner; Preuschoff, Ulf; Van Charldorp, Karin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmacologically active compounds corresponding to the general formula I, I, in which, R1 represents hydrogen a lower alkyl or cycloalkyl-, alkyl group or an optionally substituted phenyllower alkyl group, R2 denotes hydrogen or a lower alkyl group optionally substituted in the .alpha.-position to the nitrogen atom by lower alkoxy, R3 denotes hydrogen, lower alkyl lower alkoxy, halogen, or hydroxyl, n represents 1 or if the -(CH2)n- chain is in the 4-, position of the ring structure also represents 2, R4 denotes hydrogen lower alkyl, cycloalkyl, cyclo-, alkyl-lower alkyl or an optionally substituted phenyl-lower alkyl group, and, R5 denotes hydrogen lower alkyl, cycloalkyl, cyclo-, …
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 July 31, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 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.