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Expired Canadian patentCanada

Tooth for a digging bucket of an excavator

CA 1315829 C · Owner: Zhdamirov, Viktor M. · Inventors: Vinitsky, Konstantin E.; Berman, Alexandr V.; Goldbukht, Evgeny E.

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 tooth for a digging bucket of an excavator has a wedgelike profile formed by an end face and two surfaces extending at an angle with respect to each other one of which, is undulated with at least two convex portions conjugated by a concave portion. The profile of the undulated surface in the concave portion is in the form of brachistochrone. A groove is made in the end face of the tooth to extend widthwise of the tooth.

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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 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 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.
FiledJune 21, 1988
GrantedApril 6, 1993
Term endedApril 6, 2010
Patent numberCA 1315829 C
Classification (IPC)E02F3/36 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 21, 1988Patent grantedApril 6, 1993Term endedApril 6, 2010

Sources & verification

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