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Expired Canadian patentCanada

Offshore hydrocarbon production system

CA 1254447 A · Owner: Amtel, Inc. (Imodco) · Inventors: Pollack, Jack

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

An offshore mooring system is described which includes a column with an upper end connected to a vessel through a universal joint and a lower end anchored by chains to the sea floor. A weight hangs down from the bottom of the column. A pair of line guides are on the lower end of the universal joint and a pair of lines extend through the guides to the top of the column when it is being pulled up to the vessel. As the column is being pulled up the line, guides pivot the universal joint into alignment with the column.

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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 23, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 23, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 23, 1985
GrantedMay 23, 1989
Term endedMay 23, 2006
Patent numberCA 1254447 A
Classification (IPC)B63B21/54 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedApril 23, 1985Patent grantedMay 23, 1989Term endedMay 23, 2006

Sources & verification

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