Method and apparatus for drawing thermoplastic tubing
CA 1278664 C · Owner: Technicon Instruments Corporation · Inventors: Raczkowski, Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for drawing thermoplastic resin tubing to enhance its optical, dimensional and surface properties is disclosed. The method includes the steps of heating the tube within a high temperature liquid bath having a temperature above the transition temperature of the thermoplastic tube. The tubing is drawn through a polished die having a drawing diameter at least 10% smaller than the diameter of the tube to be drawn. Thereafter, the tubing is rapidly cooled.
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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 January 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- 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.