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Expired Canadian patentCanada

Apparatus for controlling the arrival of an elevator cage at an elevator floor

CA 1198531 A · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Kajiyama, Ryuichi; Yonemoto, Masashi

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 apparatus for controlling the arrival of an elevator cage at a target elevator floor in which the elevator cage is not stopped at an intermediate position between adjacent floors even when a detection displacement occurs when the actual cage position and a calculated cage position do not correspond wherein said cage is stopped at said target floor when it is detected that said actual cage position is less than or equal to said calculated elevator position and said cage is stopped at an adjacent floor to said target floor when said calculated cage position is greater than said calculated cage position.

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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 December 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2002.
  • 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 22, 1983
GrantedDecember 24, 1985
Term endedDecember 24, 2002
Patent numberCA 1198531 A
Classification (IPC)B66B1/16 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 22, 1983Patent grantedDec 24, 1985Term endedDec 24, 2002

Sources & verification

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