Derivatives of .beta-picoline and crop protection agents containing them
CA 2043091 A1 · Owner: Goetz, Norbert · Inventors: Ammermann, Eberhard; Keil, Michael; Zipperer, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
beta.-picoline derivatives of the formula where, A is CR1R2, R1 and R2 independently of each other are hydrogen alky1, alkenyl or alkynyl, or R1 and R2 together form a methylene chain B is one of the groups CH2, CHOR3, CHalR4 C=O or C=N-O-R5, R3 being, hydrogen, alkyl haloalkyl, cycloalkyl, alkenyl, acyl, phenyl benzyl, or benzoyl, where the phenyl ring is substituted or unsubstituted R4, being hydrogen, fluorine, chlorine bromine or iodine, R5 being, hydrogen, alkyl haloalkyl, cycloalkyl, alkenyl, phenyl or benzyl the, phenyl ring being substituted or unsubstituted Ar is a substituted or unsubstituted aryl radical their N-oxides and plant-tolerated acid addition salts and fungicides, …
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 May 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2013.
- 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.