Heterocyclic compounds
CA 1086320 A · Owner: Hoffmann-La Roche Limited · Inventors: Ramuz, Henri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a process for the production of a compound of the general formula, (I), wherein R represents a group of the formula , or, (a) (b), in which R1, R2 and R3 each represent a hydrogen or halogen atom or a lower alkyl, lower alkoxy, aryl-(lower alkoxy) aryloxy, phenyl, nitro, trifluoro-, methyl hydroxy, cyano, di(lower alkyl)amino or lower alkanoyloxy group or two adjacent R1, R2 and R3 symbols together represent a methylenedioxy ethylenedioxy or butadien-1,3-ylene-1,4 group R4 represents a hydrogen atom, or a lower alkyl group R5, R6 and R7 each rcpresent a hydrogen or halogen atom or a lower alkyl, lower alkoxy, hydroxy or benzyloxy group or two adjacent R5, R6 and R7 …
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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
- Granted September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
- 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.