Salts of avermectins substituted in the 4"-position and having pesticidal properties
CA 2438202 C · Owner: Syngenta Participations Ag · Inventors: Pitterna, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula, (see formula I) wherein X- is an anion; n is 1, 2, 3 or 4; R is C1-C12alkyl, C3-C8cycloalkyl; , or C2-C12alkenyl; R2 is hydrogen, unsubstituted or substituted C1-C12alkyl or C2-C12alkenyl; R3 is hydrogen, unsubstituted or substituted C1-C12alkyl C3-C12cycloalkyl, C2-C12alkenyl; or C2-C12alkynyl; or R2 and R3 together are an , alkylene or alkenylene bridge; and where applicable, E/Z isomers, E/Z , isomeric mixtures and/or tautomers, with the proviso that R1 is not sec-butyl or isopropyl , when R2 is H and R3 is methyl; and where applicable, their possible , tautomers; a process for the preparation of those compounds and their tautomers and the use thereof; …
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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 February 26, 2002 and granted February 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2024.
- 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
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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.