Herbicides
CA 2106088 A1 · Owner: Gates, Peter Stuart · Inventors: Rees, Richard; Johann, Gerhard; Harde, Christoph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Herbicidal haloacetic acid derivatives of formula (1) and salts thereof where: A is -N = or -CH = ; X is halo; R1 and R2 which may be the same or different, each represent alkyl alkoxy, haloalkyl, haloalkoxy, halo, alkylamino or dialkylamino; R3 is -CN, -COOR5, -CONR6R7, -CSNH2, -CHO -CH=Z, -CH(OAlkyl)2, -CH2OH, -, CH2OR9 or a substituted or unsub-, stituted 5- or 6-membered heterocyclic group linked via a ring carbon atom which is between two ring heteroatoms; R4 is H or a substituted or unsubstituted alkyl alkenyl, alkynyl, cycloalkyl, aryl or aralkyl group; R5 is H, -N m CR6a R6b, or a substituted or unsubstituted alkyl, alkenyl, alkynyl cycloalkyl or aralkyl group; , R6 is H 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 March 3, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2014.
- 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.