Process for the production of polyamide moulded parts with improved crystallisation behaviour
CA 2273234 A1 · Owner: Sham, Chi Keung · Inventors: Cohen, Jacob Louis; Brink, Ted; Sham, Chi Keung
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 process for the production of a polyamide moulded part from a polyamide composition comprising 0.01-5 wt.% polyamide-4.6 and 99.99-95 wt.% of a polyamide with a melting point that is lower than that of polyamide-4.6. The polyamide composition is obtained by mixing in the melt of a blend of granules of the polyamide with the low melting point (A) and a composition (B) of the polyamide-4.6 in the polyamide with the low melting point, the polyamide-4.6 content of (B) amounting to 2-50 wt.% and B having been obtained at a temperature above the melting point of polyamide-4.6. The polyamide with a low melting point is preferably polyamide-6. The process results …
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 1, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.