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Expired Canadian patentCanada

Vertical shaft impact crusher with split tub

CA 1237409 A · Owner: Cedarapids, Inc. · Inventors: Warren, Gary R.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A vertical shaft impact crusher features a split tub such that the upper portion carrying the anvil ring and anvils can be removed as a unit and inverted on the ground for fast and easy anvil removal. The upper tub portion can also be rotated relative to the lower portion in order to even out anvil wear quickly and effectively.

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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
  • 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, 1985
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237409 A
Classification (IPC)B02C13/18

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMay 13, 1985Patent grantedMay 31, 1988Term endedMay 31, 2005

Sources & verification

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