Composite pumping tree with integral shut-off valve
CA 2280581 C · Owner: Lam, Tony M. · Inventors: Farquharson, Keith D.; Lam, Tony M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A unitary pumping tree is provided for forming part of a wellhead assembly Christmas tree. The tree integrates a bottom connector shut-off valve, hydraulically actuated blow-out preventer mechanically actuated blow-out preventer flow tee and top connector.
Read the whole patent
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 August 20, 1999 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.