Process for the preparation of polyamide granules
CA 2365029 A1 · Owner: Kuehn, Frank Thomas · Inventors: Kuehn, Frank Thomas; Rulkens, Rudy
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 granule and granulate and to a process for the preparation of polyamide granules at least comprising a) polymerising at least one dicarboxylic acid and at least one diamine until a low-molecular prepolymer powder is obtained; b) processing the prepolymer powder obtained in step (a) to form granules, with the prepolymer powder being extruded at a temperature, measured under the chosen extrusion conditions below the melting , point of the prepolymer. The process of the invention allows the production of granules that have a higher granule strength than that according to the state of the art. The process of the invention also produces fewer fines. It is …
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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 March 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 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.