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Expired Canadian patentCanada

Process and device for grinding elongated objects

CA 1308559 C · Owner: Edlund, Lars G.E. · Inventors: Eskilsson, Erik B.; Gullstrand, Knut S.R.; Edlund, Lars G.E.

CIPO record

Overview

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Abstract From the Canadian patent

A process and a device for grinding especially edge, grinding, of elongated objects (15) the device consisting of, a basic frame (1) which supports a carriage (13) horizontally displaceable by means of a first pulse motor (23) and a scanner or a grinding wheel (18) vertically displaceable by means of a second pulse motor (25) and where the carriage (13) is equipped with members for clamping of the object (15) to be ground, and where the carriage (13) is directly connected to members (27) for observation when the scanner in a vertical movement comes into contact with the object (15) to be ground. The process comprises as a first step scanning of an existent profile of the object (15) to be …

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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.
FiledNovember 5, 1986
GrantedOctober 13, 1992
Term endedOctober 13, 2009
Patent numberCA 1308559 C
Classification (IPC)B24B49/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 5, 1986Patent grantedOct 13, 1992Term endedOct 13, 2009

Sources & verification

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