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Expired Canadian patentCanada

Method for effectively restraining response of a structure to outside disturbances and apparatus therefor

CA 1296746 C · Owner: Sato, Takanori · Inventors: Sato, Takanori

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

The present invention is related to a method for restraining response of a structure to outside disturbances such as winds and earthquakes etc. and an apparatus therefor. According to the invention there is provided an apparatus which comprises (a) an enclosure defining an inner space thereby (b) a liquid retained, in the enclosure and having a free surface and (c) an obstacle, means disposed in the enclosure for disturbing a flow of the liquid, whereby the liquid has at least one sloshing natural frequency and the obstacle means increases damping coefficient of the sloshing. According to the invention there is also, provided a method which comprises the steps of (a) attaching at least one …

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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.
FiledMay 9, 1988
GrantedMarch 3, 1992
Term endedMarch 3, 2009
Patent numberCA 1296746 C
Classification (IPC)E02D27/34 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 9, 1988Patent grantedMarch 3, 1992Term endedMarch 3, 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.