Method for producing thermoplastic molding materials using rubber solutions
CA 2372174 A1 · Owner: Michels, Gisbert · Inventors: Michels, Gisbert; Steinhauser, Norbert; Windisch, Heike
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 producing ABS molding materials. According to this method, a solution containing rubber is produced first and the polymerization for producing the ABS molding compounds is then carried out in the presence of this solution containing rubber. Said solution containing rubber is produced by polymerizing diolefines in a solution of vinylaromatic monomers, in the presence of a catalyst containing the following: (a) at least one compound of the rare earth metals; (b) at least one organo-aluminum compound; and (c) optionally, a Lewis acid.
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 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 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.