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Expired Canadian patentCanada

Calcium soap thickened front-wheel drive grease

CA 1297862 C · Owner: Amoco Corporation · Inventors: Waynick, John A.

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 performance lubricating grease effectively lubricates and greases front-wheel drive joints. The front-wheel drive grease has excellent extreme pressure properties and antiwear qualities and is economical non-, toxic and safe. In one preferred form the front-wheel, drive grease comprises a base oil a thickener comprising, polyurea and calcium complex soap and an additive, package comprising tricalcium phosphate and calcium carbonate.

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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 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.
FiledMay 13, 1988
GrantedMarch 24, 1992
Term endedMarch 24, 2009
Patent numberCA 1297862 C
Classification (IPC)C10M169/06

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 13, 1988Patent grantedMarch 24, 1992Term endedMarch 24, 2009

Sources & verification

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