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Expired Canadian patentCanada

Method and apparatus for grinding the tread and/or guide surfaces of rails or the like

CA 1301459 C · Owner: Guntermann, Hans · Inventors: Arndt, Gerhard; Guntermann, Hans

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

Method and apparatus for grinding the tread and/or guide surfaces of rails or the like ABSTRACT, A method for grinding the running and/or guide surfaces of rails or the like wherein the surfaces are ground by a continuous, rotating abrasive belt that is movable against them the, running and/or guide surfaces of the rail being ground by the abrasive belt that travels transversely to the longitudinal axis of the rail and when prestressed is at least partially wrapped around the running and/or guide surfaces as well as a device to, realize the method. The device comprises a grinding machine movably guided on at least one rail of the track this grinding, machine having a continuous abrasive …

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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 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.
FiledSeptember 21, 1989
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301459 C
Classification (IPC)E01B31/17

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedSep 21, 1989Patent grantedMay 26, 1992Term endedMay 26, 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.