Method and apparatus for determining the flow rate of a viscous fluid stream
CA 2063545 C · Owner: Anger, Steven J. · Inventors: Devonshire, William J.; Anger, Steven J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of determining the flow rate of a viscous fluid stream comprises passing the fluid stream through a field of view of an electronic imaging device which produces, output signals representing images of the fluid stream at successive times t0, t1, ...t n. Signals representing an image of the fluid stream at a first time t i are stored in a first memory, while signals representing an image of the fluid stream at a second time t j, are stored in a second memory. The time t j- t i is less than the time taken for a point on the fluid stream to cross the field of view of the imaging device. The stored signals are then analyzed to derive width signals W(y) representing the width of the …
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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 March 19, 1992 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.