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Expired Canadian patentCanada

Fiber forming bushing

CA 1311358 C · Owner: Kuhn, John Joseph · Inventors: Kuhn, John Joseph; Palamara, Eugene James

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 fiber glass bushing having a thermocouple embedded in the bottom thereof and a method of preparing the same is described. The thermocouple is carried in a plate member which is welded to the bushing bottom by a weld on the outside of the bushing.

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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 December 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 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.
FiledJanuary 20, 1988
GrantedDecember 15, 1992
Term endedDecember 15, 2009
Patent numberCA 1311358 C
Classification (IPC)C03B37/08 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 20, 1988Patent grantedDec 15, 1992Term endedDec 15, 2009

Sources & verification

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