Method of shaping powdery, thermally unstable thermoplastic shaping compounds
CA 2267357 A1 · Owner: Wengemuth, Kerstin · Inventors: Sela, Marion; Radusch, Hans-Joachim; Metzner, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns powdery, thermally unstable thermoplastic shaping compounds which are to be processed to form semi-finished products or shaped parts such that thermal decomposition processes are prevented and the semifinished products and shaped parts display a high level of mechanical properties. To that end, the powdery thermoplastic shaping compound which is , precompressed under hydrostatic pressure is exposed to a deviatoric stress , below its melting temperature.
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 September 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2019.
- 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.