Tricyclic or tetracyclic compounds, process for the preparation thereof, and pharmaceutical composition containing the same
CA 1265788 C · Owner: Uno, Hitoshi · Inventors: Sato, Fuminori; Kurokawa, Mikio; Hatano, Naonobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The present invention is directed to compounds of the formula:, wherein A means an alkylene; Y-Z means -CH-CH-, -CH2CH2-. or , ; R1 and R2 are each a substituent; R3 is a hydrogen atom, alkyl, or alkoxy, R4 is phenyl phenyl-, alkyl, phenylalkenyl, diphenylmethyl naphthyl, thiazolyl, optionally substituted pyridyl optionally substituted, pyrimidinyl, quinolyl benzoylalkyl, benzoyl, furoyl, thenoyl phenyloxycarbonyl, phenyloxysulfonyl, or phenylsulfonyl; a is 2 or 3, b and c are each 1 or 2 and d is an, integer of 0 to 2, provided that the phenyl phenyl moiety, and naphthyl may optionally be substituted or a pharmaceu-, tically acceptable salt thereof processes for 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 February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- 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.