Piperazinyl-pyridine compounds
CA 1051888 A · Owner: A. Christiaens Societe Anonyme · Inventors: Thunus, Leopold N.; Delarge, Jacques E.; Lapiere, Charles L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New derivatives of pyridine are provided of the formula: (I), in which R1 which may be either in the 3-position or in the 5-position represents a group selected among those of the formulae -CN, , wherein R3 and R4, which may be identical or different each, represent hydrogen, a C1-C3 alkyl group which may be substituted by a C1-C2-alkoxy group or by a methylpiperazinyl group or R3 and R4 form together with the attached nitrogen atom a pyrrolidinyl, piperidyl, methylpiperidyl, morpholinyl methylpiperazinyl or, homopiperidyl ring and R2 which may be in the 2-, 4 or 6-position represents a C1-C3 alkylpiperazinyl or hydroxethylpiperazinyl group; the new derivatives have interesting …
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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 April 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 1996.
- 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.