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Expired Canadian patentCanada

Corrosion-resistant light-weight spot welding gun

CA 1098968 A · Owner: Smith, Adrian P. · Inventors: Smith, Adrian P.

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

A light weight spot welding gun has an aluminum body with silver-plated sockets for fixed and movable electrodes. The body has cooling water passages communicating with the sockets. To prevent corrosion and clogging of the passages the passages are nickel-plated.

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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 April 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 16, 1978
GrantedApril 7, 1981
Term endedApril 7, 1998
Patent numberCA 1098968 A
Classification (IPC)B23K11/10

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJune 16, 1978Patent grantedApril 7, 1981Term endedApril 7, 1998

Sources & verification

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