Method of forming highly oriented thermoplastic articles
CA 1262810 C · Owner: Gunn, Charles Lloyd · Inventors: Gunn, Charles Lloyd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for forming deep drawn highly oriented thin-walled thermoplastic articles including the steps of planarly supporting a sheet of at least partially crystalline thermoplastic polymeric material and establishing at least one differentially heated area within the sheet. The differentially heated area is to include an outer cool zone having a temperature range generally below the crystalline melt point of the thermoplastic material a hot zone, disposed within the outer zone having a temperature range generally above the crystalline melt point but below the complete melt point of the thermoplastic material and an inner cool zone, located centrally of the hot zone having a temperature …
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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
- Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.