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Expired Canadian patentCanada

Retainer for reel toothbar bearing

CA 2206867 C · Owner: Wellman, Stanley Paul · Inventors: Keller, Melvin William; Wellman, Stanley Paul

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 bearing or bushing retainer comprises two identical separate segments which, are generally c-shaped so as to permit the segments to each be removed from a cylindrical split plastic bearing mounted on a reel toothbar once bolts holding the two segments together are released and the segments moved axially relative to each other so as to disengage respective axially extending tabs of the segments from gaps defined between opposite ends of the segments. The segments have a relatively heavy cross section and are made of sintered powdered metal of relatively high carbon content and, are heat treated thereby resulting in a part having a long wear life and having a natural lubricity resulting in …

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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

  • Filed May 15, 1997 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 15, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2019.
  • 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 15, 1997
GrantedFebruary 22, 2000
Term endedMay 15, 2017
Patent numberCA 2206867 C
Classification (IPC)F16C35/06 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedMay 15, 1997Patent grantedFeb 22, 2000Term endedMay 15, 2017

Sources & verification

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