Method for the production of grafted copolymers made of starch, tert-alkylazocyanocarboxylic acid esters and grafted copolymers and the use thereof
CA 2453657 A1 · Owner: Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. · Inventors: Begli, Alireza Haji; Bruzzano, Stefano; Sieverling, Nathalie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the production of grafted copolymers with a skeleton formed from starch or the derivatives thereof. Production occurs by means of tert-alkylazocyanocarboxylic acid esters of starch which are coupled by radical reaction with vinyl monomers. The invention also relates to grafted copolymers of starch the dispersions thereof and the use , of said grafted copolymers.
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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 July 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2024.
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Timeline
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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.