Low individual color thermoplastic molding material
CA 2294918 A1 · Owner: Guntherberg, Norbert · Inventors: Heinen, Hartmut; Koch, Jurgen; Niessner, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to thermoplastic molding material containing the constituents A) to F), 5 to 80 wt. % of a graft polymer A) with a bimodal particle size distribution, 20 to 95 wt. % of a thermoplastic polymer B) with a viscosity VZ of 50 to 120 ml/g and optionally other thermoplastic polymers C), D) and/or E) based on at least one vinyl-aromatic monomer and optionally , additives F). The inventive material can be obtained by 1) producing the graft polymers A) according to the emulsion polymerization method 2) mixing the , graft polymer A) with polymer B) and insofar as they are available, the other constituents C), D), E) and/or F) in a mixing device whereby a substantially , …
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 June 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 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.