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Expired Canadian patentCanada

High temperature screw lubricating paste

CA 1285547 C · Owner: Holinski, Ruediger · Inventors: Huber, Wilhelm; Holinski, Ruediger

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 high temperature screw lubricating paste is described which consists essentially of finely divided tin dioxide and optionally, a thermally stable inorganic filler homogeneously dispersed in a carrier oil. The inert paste may be used with threaded connections to provide a low break-away torque when the connections are exposed to high temperatures for extended periods.

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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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.
FiledFebruary 6, 1987
GrantedJuly 2, 1991
Term endedJuly 2, 2008
Patent numberCA 1285547 C
Classification (IPC)C10M103/06 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedFeb 6, 1987Patent grantedJuly 2, 1991Term endedJuly 2, 2008

Sources & verification

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