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Expired Canadian patentCanada

Ceramic seal assembly

CA 1325442 C · Owner: Richardson, Kenneth R. · Inventors: Rampel, Guy G.; Denoncourt, Peter J.; Prickett, Orville G.

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 ceramic seal assembly for electrically insulating and hermetically securing a terminal to a housing through which the terminal extends. The housing contains a fluid at a high pressure and an electrical device to which the terminal is connected. An adapter is provided for hermetically securing the seal assembly to the housing. The adapter comprises a generally tubular member defining two end portions and a collar secured to one of the two end portions. The seal assembly and housing are hermetically secured to the tubular member at separate locations. The seal assembly contains at least one annular ceramic member and is oriented such that the high pressure fluid contained within the housing …

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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 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 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.
FiledJuly 17, 1989
GrantedDecember 21, 1993
Term endedDecember 21, 2010
Patent numberCA 1325442 C
Classification (IPC)H01M2/08 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJuly 17, 1989Patent grantedDec 21, 1993Term endedDec 21, 2010

Sources & verification

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