8-piperazinyl-1, 7-naphthyridine derivative
CA 1300630 C · Owner: Honda, Haruyoshi · Inventors: Honda, Haruyoshi; Yoshida, Yuko; Kouda, Tadayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An 8-piperazinyl-1,7-naphthyridine derivative represented by the following formula (I): (I), in which R represents a hydrogen atom; a formyl group; a lower alkanoyl group; a benzoyl group which may have one or more halogen atom, nitro group, or lower alkoxy group substituents; a furanylcarbonyl group; a pyridylcarbonyl group; a phenyl group which has one or more halogen atom lower alkoxyl group, or trifluoromethyl group substituents; a pyridyl group; a benzyl group; a diphenylmethyl group, or a benzenesulfonyl group which may have one or more lower alkyl group or halogen atom substituents; or a pharmaceutically acceptable salt thereof. The compound has excellent antiinflammatory …
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
- Granted May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.