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Expired Canadian patentCanada

Marine structure constructing method

CA 1205642 A · Owner: Taisei Corporation · Inventors: Kanzaki, Tadashi; Honda, Touru

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A marine structure is constructed by placing on seabed a topless r bottomless, hollow box-like caisson having a pair of longitudinal side walls each consisting of interconnected arch shells, a pair of straight lateral side walls connecting the longitudinal side walls and a footing extending along and outwardly from the bottom edge of each longitudinal side wall, and introducing concrete into the cavity of the caisson in staking relation to the seabed, and further introducing sand and earth into the caisson cavity above the concrete layer.

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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 June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 1, 1983
GrantedJune 10, 1986
Term endedJune 10, 2003
Patent numberCA 1205642 A
Classification (IPC)E02D23/02 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJune 1, 1983Patent grantedJune 10, 1986Term endedJune 10, 2003

Sources & verification

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