Use of water-soluble or water-dispersible, polyether block containing graft polymers as coating agents, matrix formers and/or packaging materials for agrochemicals
CA 2450386 A1 · Owner: Basf Aktiengesellschaft · Inventors: Schneider, Tanja; Meffert, Helmut; Gomez, Marcos
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to water-soluble or water-dispersible film-forming , graft polymers which are obtained by radical polymerization of (a) the vinyl esters of aliphatic C1-C24 carboxylic acids in the presence of (b) the polyethers having an average molecular weight (number average) of at least 300 of the general formula (I), wherein the variables independently have the following meanings: R1 represents hydroxy amino, C1-C24 alkoxy, R9-COO-, R9-, NH-COOa polyalcohol group; R2 to R7 represent -(CH2)2- -(CH2)3-, -(CH-2)4-, -CH2-CH(CH3)-, -CH2-CH(CH2-CH3)- -CH2-CHOR10-CH2-; R8 represents hydrogen amino-C1-C6 alkyl, C1-C24 alkyl, R9-CO- R9-NH-CO-; R9 represents C1-C24 , alkyl; R10 …
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 31, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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.