Pulse echo technique for detecting fluid flow
CA 2031944 A1 · Owner: Shell Canada Limited · Inventors: Rambow, Frederick Henry Kreisler
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
T-8360, DRS:VS, PULSE ECHO TECHNIQUE FOR DETECTING FLUID FLOW Abstract of the Disclosure, A method and apparatus for detecting fluid flow behind an acoustically reflective structure using pulse echo technique which do not depend upon measurement of a Doppler effect. A transducer is provided for generating a high frequency beam of acoustical energy in the form of pulses. The transducer is placed proximate preferably adjacent, the reflective, structure such that the acoustic beam is directed toward such structure. A transducer is also provided for detecting the acoustic reflections of the pulses, proximate the position from which the pulses originated and gener-, ating corresponding …
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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 December 11, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 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
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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.