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Expired Canadian patentCanada

Liquid organopolysiloxane compositions

CA 1314280 C · Owner: Gardiner, William · Inventors: Gardiner, William

CIPO record

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Abstract From the Canadian patent

An organopolysiloxane composition comprising (1) a polydiorganosiloxane, (2) an organosiloxane having at least one silicon-bonded group selected from anilinophenoxy and naphthylaminophenoxy groups and (3) a siloxy metal compound wherein the metal is Ti, Zr or Hf, or a zirconium salt of a monocarboxylic acid. The compositions are stabilised against high temperature oxidative degeneration and are useful inter alia as viscous coupling fluids for automobile fan clutches.

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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 March 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 9, 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.
FiledApril 12, 1988
GrantedMarch 9, 1993
Term endedMarch 9, 2010
Patent numberCA 1314280 C
Classification (IPC)C10M105/76 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedApril 12, 1988Patent grantedMarch 9, 1993Term endedMarch 9, 2010

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