System for pumping well fluids
CA 2201497 C · Owner: Muth, Garold M. · Inventors: Muth, Garold M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a pumping system having parallel power tubing (12) and production tubing (13) strings in which production is pumped up the production tubing (13) through a flow control valve (32) and a rod (25) operated insertable and removable pump (24) is disconnectably connected into the power tubing (12) wherein the insert type pump (24) and the flow control means (32) may be removed from and inserted into the tubing strings without the need to remove either tubing string from the well.
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 October 19, 1995 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2017.
- 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.