Fluid control device for removal of well tubing from a well
CA 2019130 A1 · Owner: Greupner, Terry · Inventors: Greupner, Terry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid control unit is designed for use in removing wet tubing from a well and comprises a substantially closed box with a hole in the top and bottom plate and which is mounted a sealing rubber. The box can thus slide along the tubing forming a seal at the top and bottom sealing rubbers so that the box is closed around the tubing. A duct on one side of the housing can discharge fluid communicated into the housing by separation of one section of tubing from the next while the housing bridges the gap between the sections. The unit thus enables the tubing to be removed while fluid in the tubing is properly discharged under control in a suitable storage location.
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 June 15, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 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.
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.