Avermectins substituted in the 4"-position having pesticidal properties
CA 2435494 C · Owner: Boehringer Ingelheim Animal Health Usa Inc. · Inventors: O'Sullivan, Anthony Cornelius; Pitterna, Thomas; Lutz, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
What is described are a compound of formula (I) in which R1 is C1-C12alkyl, C3-C8cycloalkyl or C2-C12alkenyl; R2 is H unsubstituted or mono- to , pentasubstituted C1-C12alkyl or unsubstituted or mono-to pentasubstituted C1- C12alkenyl; R3 is C2-C12alkyl, mono- to pentasubstituted C1-C12alkyl unsubstituted or mono- to pentasubstituted C1-C6alkoxy-C1-C6alkyl unsubstituted or mono- to pentasubstituted C3-C12cycloalkyl C2-C12alkenyl, C2-, C12alkynal; or R2 and R3 together are an alkylene or alkenylene bridge; with the provison that R1 is not sec-butyl or isopropyl if R2 is H and R3 is 2hydroxyethyl, isopropyl, n-octyl or benzyl; or if appropriate, in E/Z isomer, an E/Z isomer mixture and/or a …
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 February 26, 2002 and granted April 19, 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
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.