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Expired Canadian patentCanada

Topology fabrication apparatus

CA 1298689 C · Owner: Rolston, George A. · Inventors: Valavaara, Viljo K.

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

Topology body apparatus having an extrusion head for extruding a settable plastic material a mounting arm, on which the extrusion head is mounted a carriage bar on, which the mounting arm is mounted a base, extrusion head, drive means for driving the extrusion head relative to the carriage bar, carriage drive means for driving the carriage bar relative to the base, and control means for controlling the extrusion head, the extrusion head drive means and the carriage drive means, separately and independently from one another, to procure three axes of movement of the extrusion head to progressively extrude and deposit portions of a three-dimensional solid body having a predetermined topography.

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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 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 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.
FiledFebruary 11, 1988
GrantedApril 14, 1992
Term endedApril 14, 2009
Patent numberCA 1298689 C
Classification (IPC)B29C48/92

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 11, 1988Patent grantedApril 14, 1992Term endedApril 14, 2009

Sources & verification

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