Process for preparing thermoplastic molding compositions
CA 2327557 C · Owner: Sturm, Harald · Inventors: Neu, Thomas; Stieneker, Axel; Sturm, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for preparing a thermoplastic polyvinyl chloride molding composition with improved impact strength and corner strength and with improved optical properties. The process uses an impact modifier. The impact modifier has a core-shell structure in which the core is vinyl chloride homo- or copolymer and the shell is elastomeric and is a cross-linked alkyl (meth)acrylate homo- or copolymer.
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 December 5, 2000 and granted February 8, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2022.
- 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.