Method for measuring of flow and flowmeter
CA 2214707 C · Owner: Posiva Oy · Inventors: Rouhiainen, Pekka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A measuring procedure and a flowmeter for the measurement of liquid flow in a hole bored in the ground, such as rock. The flowmeter consists of a long cylindrical body comprising: ring-shaped sealing elements (5) placed at a distance from each other in the longitudinal direction to seal off a certain volumetric section from the rest of the hole; dividing elements (6) for dividing the volumetric section into at least three sectors (1) extending from one sealing element to the other; flow ducts (2) interconnecting the sectors; an impulse source (3) placed at the junction of the flow ducts; and sensors (4) placed in the flow ducts for measuring the magnitudes and velocities of currents between …
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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 January 15, 1996 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 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.