Aqueous contact adhesive dispersions, process for their preparation, and their use
CA 2085206 C · Owner: Krell, Manfred · Inventors: Huster, Wilfried; Fischer, Joachim; Krell, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to aqueous contact adhesive dispersions containing, based on the total weight of the dispersion from 40 to, 70% by weight of a copolymer prepared by emulsion polymerization where the copolymer contains, a) from 40 to 70% by weight of vinyl esters of aliphatic carboxylic acids having 2 to 12 carbon atoms b) from 10 to 40% by weight of acrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms, c) from 8 to 15% by weight of methacrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms, d) from 0.1 to 3% by weight of ethylenically unsaturated compounds which cause cross-linking, e) from 0.1 to 5% by weight of ethylenically unsaturated carboxylic …
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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 December 11, 1992 and granted December 2, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 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.