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Expired Canadian patentCanada

Coatings comprising alkanolamine-carboxylic acid salts for friction material

CA 1202533 A · Owner: Ford Motor Company Of Canada, Limited · Inventors: Weintraub, Marvin H.; Anderson, Arnold E.; Melotik, Donald J.

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Abstract From the Canadian patent

Abstract of the Disclosure, A method for using alkanolamine-carboxylic acid salts as a coating for friction materials which during use contact, at least part of the time, rustable metals. The method comprises contacting the friction material with an aqueous solution comprising at least about 0.05 weight alkanolamine-carboxylic acid salts being the reaction product of:, (i) alkanol amine; and, (ii) C4-C20 carboxylic acid; and thereafter evaporating water from the aqueous coating on the friction material so as to leave the friction material with a coating comprising alkanolamine-carboxylic acid salts. Friction materials coated by above method are also claimed.

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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 April 1, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 4, 1983
GrantedApril 1, 1986
Term endedApril 1, 2003
Patent numberCA 1202533 A
Classification (IPC)C08J5/14 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedOct 4, 1983Patent grantedApril 1, 1986Term endedApril 1, 2003

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