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Expired Canadian patentCanada

Method for manufacturing tubes, bars and strips

CA 1313780 C · Owner: Rantanen, Mauri Vihtori · Inventors: Rantanen, Mauri Vihtori

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The method of the invention relates to the manufacturing of tubes bars and strips of a continuously cast or the like billet by means of cold working, wherein the temperature of the material rises to the recrystaliization range due to the influence of the deformation resistance. The method is particularly related to the further working of billets made of non-ferrous metals such as copper aluminium, nickel, zirconium and titanium as well as of their alloys.

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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 February 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 22, 1988
GrantedFebruary 23, 1993
Term endedFebruary 23, 2010
Patent numberCA 1313780 C
Classification (IPC)B21B3/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 22, 1988Patent grantedFeb 23, 1993Term endedFeb 23, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.