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Expired Canadian patentCanada

Method for forming a titantium lined electrochemical cell

CA 1287752 C · Owner: Beaver, Richard Neal · Inventors: Dang, Hiep Dinh; Beaver, Richard Neal

CIPO record

Overview

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

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Abstract From the Canadian patent

A method of welding a titanium sheet having a thickness of less than about 2 millimeters to a ferrous metal, characterized by employing a weldably compatible intermediate metal and a titanium intermediate between the titanium sheet and the ferrous metal. 31,796-F

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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 August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 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.
FiledDecember 16, 1985
GrantedAugust 20, 1991
Term endedAugust 20, 2008
Patent numberCA 1287752 C
Classification (IPC)B23K35/30 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedDec 16, 1985Patent grantedAug 20, 1991Term endedAug 20, 2008

Sources & verification

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