4-acyloxyquinoline derivatives and insecticidal or acaricidal compositions containing same
CA 2020667 C · Owner: Meiji Seika Kabushiki Kaisha · Inventors: Iwata, Michiaki; Shimura, Masaru; Inouye, Shigeharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A 4-acyloxyquinoline derivative represented by the general formula (I):, wherein R1 represents a hydrogen atom a C1-C,8 alkyl, C2-C18, alkenyl, C3-C10 cycloalkyl which may be optionally substituted phenylloweralkyl, phenoxyloweralkyl, aryl group a group OR4, where R4 represents a lower alkyl or aryl group or a grou p, where X represents an oxygen or a sulphur atom; R2 represents a hydrogen atom, a lower alkyl group or a group -COOR5 where, R5 represents a hydrogen atom or a lower alkyl group; R3 represents a hydrogen atom, a C1-C10 alkyl or C2-C10 alkenyl group, provided that R1 does not represent OR4 when R2 is a hydrogen atom and R3 is methyl; R2 and R3 together represent a group (CH2)m, …
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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
- Filed July 6, 1990 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 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.