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Expired Canadian patentCanada

Method for laying an underwater pipe to straddle an already laid pipe, and the relative devices

CA 1136437 A · Owner: Saipem S.P.A. · Inventors: Scodino, Ambrogio; Rosa, Giovanni

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Method an apparatus for laying an underwater pipe to straddle an already laid pipe comprising fastening to the pipe to be laid, at appropriate distances apart a set, of trestles the heights of which are gradually increasing and decreasing consistent with the bend to be imparted to the pipe to be laid in order to have it positioned in the correct straddling relationship relative to the already laid pipe.

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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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
  • 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 28, 1980
GrantedNovember 30, 1982
Term endedNovember 30, 1999
Patent numberCA 1136437 A
Classification (IPC)F16L1/20 +1 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedMay 28, 1980Patent grantedNov 30, 1982Term endedNov 30, 1999

Sources & verification

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