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Expired Canadian patentCanada

Indirect extrusion press with ram-mounted turret supporting tool

CA 1307236 C · Owner: Stewart, Charles L. · Inventors: Stewart, Charles L.

CIPO record

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

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Abstract From the Canadian patent

An indirect extrusion press and method of operating the press. The press includes a container with opposited axial ends and an axial cavity for receiving a billet. The container is mounted for aligning the axial cavity with the extrusion axis. A bolster is disposed adjacent one axial end of the container for blocking movement of a billet out of the cavity when a force is applied against the billet from the other axial end of the container. A ram is mounted on the side of the container adjacent the other axial end of the container for movement in the axial direction of the container. The ram has an axial passage therethrough aligned with the extrusion axis. A rotatable turret is mounted on …

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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 September 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 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.
FiledJuly 17, 1987
GrantedSeptember 8, 1992
Term endedSeptember 8, 2009
Patent numberCA 1307236 C
Classification (IPC)B21C23/21

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJuly 17, 1987Patent grantedSep 8, 1992Term endedSep 8, 2009

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