Hetero-aryloxy-.beta.-carbolines, their preparation and their use in medicamens
CA 2087098 A1 · Owner: Schering Aktiengesellschaft · Inventors: Seidelmann, Dieter; Schneider, Herbert; Stephens, David N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described are hetero-aryloxy-.beta.-carbolines of the formula (I), in which RA is a triazine-condensed or benzo-condensed heteroaryl entity with 1-2 nitrogen atoms which may, optionally be substituted by halogen C1-6alkyl, C1-6alkoxy, C1-6alkylthio, trifluoromethyl or SO2-R1 or a 5 or 6-, membered hetero-aryl entity with 1-2 nitrogen atoms substituted by halogen, C1-6alkyl, C1-6alkoxy C1-6alkylthio, trifluoromethyl or SO2-R1. Also described is the preparation of these compounds and their use in medicaments.
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 June 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 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.