Patent Yard Sign in
Expired Canadian patentCanada

Friable socket thread electrode joint

CA 1103729 A · Owner: Union Carbide Corporation · Inventors: Burwell, William H.

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

An electrode joint having tapered threaded recesses in the mating electrode sections and a connecting threaded nipple, with a friable thread segment either in each threaded recess, or on half of the threaded nipple the, friable thread being thickened along at least a portion of its long flank and being reduced in thickness along its short flank.

Read the whole patent

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 June 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 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.
FiledMay 23, 1978
GrantedJune 23, 1981
Term endedJune 23, 1998
Patent numberCA 1103729 A
Classification (IPC)F16D9/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 23, 1978Patent grantedJune 23, 1981Term endedJune 23, 1998

Sources & verification

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