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Expired Canadian patentCanada

Weight set connecting mechanism for subsea tubular members

CA 2031673 C · Owner: Cooper Cameron Corporation · Inventors: Farrell, Thomas J.

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 improved mechanism for connecting tubular members in a subsea well in which the members are locked together in a preloaded condition. In the preferred form of the invention the loading is provided by a series of fingers mounted on the inner tubular member and flexing through a restriction in the outer tubular member during landing and then springing back from such flexed position to engage and wedge against a tapered shoulder at the lower end of the restriction to both lock the inner tubular member in its seated position and also to provide the preloading desired. In a second form the, inner member is landed on a ring which is engaged on the outer tubular member landing seat and then …

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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

  • Filed December 6, 1990 and granted October 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 6, 1990
GrantedOctober 15, 2002
Term endedDecember 6, 2010
Patent numberCA 2031673 C
Classification (IPC)E21B33/03 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedDec 6, 1990Patent grantedOct 15, 2002Term endedDec 6, 2010

Sources & verification

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