Piperidinoalkyl derivatives of carboxylic acid amides
CA 1339895 C · Owner: Goto, Giichi · Inventors: Goto, Giichi; Nagaoka, Akinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to unsaturated carboxylic acid amide derivatives of the formula (see figure I) wherein ring A stands for an optionally substituted aromatic ring; R1 stands for a hydrogen atom or an optionally substituted hydrocarbon residue or forms an optionally substituted carbocyclic ring with the adjacent group -CH=C- together with two carbon atoms constituting the ring A; R2 stands for a hydrogen atom an, optionally substituted hydrocarbon residue or an optionally substituted acyl group; R3 stands for an optionally substituted hydrocarbon residue; and n denotes an integer ranging from 2 to 6 and salts thereof, as well as the production thereof. The unsaturated carboxylic …
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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 June 2, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2015.
- 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.