Procedure for manufacturing pipes and sections out of thermoplastic plastics
CA 1308530 C · Owner: Dobrowsky, Josef · Inventors: Dobrowsky, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A procedure for manufacturing pipes and sections out of thermoplastic plastics in which these substances are expelled through a revolving opening and the temperature in the area of the opening is controlled. To hold the wall thickness of the section or pipe produced during such a procedure constant, the change in the wall thickness of the pipe which comes about as a function of the change in temperature in the area of the opening is determined and the temperature is regulated depending on the correlation and the given set wall thickness, where the temperature in the area of the opening is regulated separately section by section with the, latter sections extending in the circumferential …
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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 2009.
- 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.