Quinoline derivatives, their production and use
CA 2071224 C · Owner: Meguro, Kanji · Inventors: Ikeda, Hitoshi; Meguro, Kanji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A quinoline derivative of formula (I), wherein each phenyl ring of A and B can have one or more substituents; X is (II) (R1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group) or (III) (R2 is a hydrogen atom or a lower alkyl group); Y is -(CH2)m-(m is 0, 1 or 2) or -CH = CH- Z is a group of formulae (IV), (V) , or (VI) wherein each phenyl ring of C and D, can have one or more substituents R3 and R4 are each a hydrogen or halogen atom, or a lower alkyl, lower alkoxy, lower acyloxy, lower alkoxycarbonyloxy, N,N-di-lower alkylcarbamoyloxy optionally , esterified carboxy or hydroxyl group R5 is, a halogen atom, or a lower alkyl lower alkoxy, lower acyloxy, lower , …
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
- Filed December 10, 1990 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2012.
- 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.