Apparatus and method for loading fluid into subterranean formations
CA 2229672 C · Owner: Halliburton Energy Services, Inc. · Inventors: Skinner, Neal G.; Ringgenberg, Paul D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for loading fluid into subterranean formations comprising a housing, a sleeve slidably disposed within the housing, a piston defining an interior volume the piston slidably disposed within the sleeve and within the housing such that a fluid pressure within the interior volume causes the sleeve to oscillate relative to the housing and causes the piston to oscillate relative to the sleeve and the housing, and a pump which is operably associated with the piston such that the fluid pressure from the interior volume is intensified in the pump and injected into the formation as the piston oscillates relative to the housing.
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 February 16, 1998 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2020.
- 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.