Level detector for solids
CA 2202004 A1 · Owner: Cherek, Bogdan · Inventors: Cherek, Bogdan; Pawliw, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vibrating probe for detecting a threshold level of solids within a vessel consists of an ultrasonic acoustic transducer assembly having a resonant frequency the, assembly being supported within the vessel and including a coupling member to couple the transducer acoustically to the solids at the threshold level, a transmitter for generating repeated bursts of high-frequency electrical energy and applying them to the transducer the bursts, being of sufficient amplitude to render the assembly self cleaning of adherent solids, a circuit for measuring the amplitude of ringing of the transducer after cessation of each burst, and a circuit for comparing the amplitude of such ringing at a …
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 April 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2019.
- 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.