2-phenylbenzobfurans, processes for their manufacture and pharmaceutical preparations containing them
CA 2110062 A1 · Owner: Von Angerer, Erwin · Inventors: Schneider, Martin; Von Angerer, Erwin; Erber, Sebastian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to new furans and thiophenes with the general Formula I, (I), in which R1 and R2 independently of one another denote a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a benzyl group, a group C(O)R4, wherein R4 is an alkyl or alkoxy group having 1 to 10 carbon atoms or a phenyl radical, or a carbamoyl group -C(O)NR5R6 where R5, and R6 independently of one another are a hydrogen atom or an alkyl group having 1 to 10 carbon atoms and n denotes, an integer from 0 to 12 if R3 is a hydrogen atom or n, denotes an integer from 4 to 12 if R3 is an amino group -NR7R8, where R7 and R8 independently of one another represent a hydrogen atom or an alkyl group having 1 to …
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 May 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 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.