Pump/separator apparatus for viscous liquids
CA 2185176 C · Owner: Markovitch, Peter Theodore · Inventors: Markovitch, Peter Theodore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pump/separator apparatus is disclosed for pumping a viscous fluid mixture upwardly from an underground location and for carrying out at least partial separation of the mixture into separate component parts or phases. The apparatus comprises a cylindrical housing 2.15 having an intake 12 at or near its lower end to receive the viscous fluid mixture and an upper discharge end to which the fluid can be pumped. An inner impeller rotatably mounted in the housing 2.15 generates a spirally upwardly moving column of fluid which rotates around the axis of the housing 2.15 and thereby induces inward flow of the mixture through the intake 12. A stack of rotary disks 2.9 is arranged in the housing …
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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 September 10, 1996 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2018.
- 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.