Use of mixtures of polymers and aminonisothiazols as biocides
CA 2303189 A1 · Owner: Basf Aktiengesellschaft · Inventors: Tropsch, Jurgen; Zeller, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of mixtures of (A) polymers and aminoisothiazols (B) in addition to the metal complexes and acid additive salts thereof as biocides. Said polymers (A) contain the following constituents integrated by means of polymerisation: (a) 0.1 - 100 mol % vinyl amine units or ethylene imine units, (b) 0-99.9 mol % units of at least one monomer from the group consisting of N vinyl carboxylic acid amides of formula (I), wherein R1, R2=H or C1-C6 alkyl, vinyl formiate vinyl acetate, vinyl , propionate, vinyl alcohol C1-C6 alkyl vinyl ether, monoethylenically unsaturated C3-C8 carboxylic acids, their esters nitriles, amides and , anhydrides, N vinylurea N …
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 September 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2020.
- 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.