Ergolinyl heterocycles
CA 1287624 C · Owner: Mantegani, Sergio · Inventors: Pegrassi, Lorenzo; Rossi, Alessandro; Mantegani, Sergio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ergoline derivatives of the formula I I, wherein R1 represents a hydrogen atom or a methyl group; R2 represents a hydrogen atom or a methoxy group; R3 represents a hydrocarbon group having from 1 to 4 carbon atoms;, X represents a nitrogen atom and Y represents an oxygen atom, a -?-R4 or a -N=?-R5 group wherein R4 represents a hydrogen atom, a C1-C4 alkyl or a phenyl group, R5 represents a hydrogen atom, a C1-C4 alkyl a, phenyl, an amino or di(C1-C4 alkyl)amino group and the nitrogen atom of the group -N=?-R5 is not joined to the nitrogen atom represented by X, or Y represents a nitrogen atom and X represents an oxygen atom or a -?-R4 group wherein R4 is as above defined;, and the …
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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 August 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2008.
- 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.