Industrial ultrasound part control method and device using time reversal
CA 2103193 C · Owner: Chakroun, Najet · Inventors: Chakroun, Najet; Mangenet, Gerard Yves; Beffy, Lionel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns an industrial ultrasound part control method of the type said to be consistent time reversal after emission of an unfocused ultrasound beam and reception of returned echo to re-emit this echo signal after reversal of its distribution over time. According to the invention the part to be examined travels in a continuous rotary movement while the ultrasound transducer travels in a continuous step by step linear movement where each movement corresponds to a whole number of revolutions of the part.
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 November 16, 1993 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2015.
- 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.