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Expired Canadian patentCanada

System and method for residual tire life prediction by ultrasound

CA 1096033 A · Owner: Gard, Inc. · Inventors: Lichodziejewski, Wieslaw L.; Mathieson, Thomas A.; Ash, Leon

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Abstract From the Canadian patent

A system preferably a pulse echo reflection system for, residual tire life prediction by ultrasound includes; a transmitter transducer; means to provide pulses of electrical energy to the transmitter transducer, that converts the electrical pulses into pulses of ultrasonic vibrations and transmits them into an area of the ply-containing portion of the carcass of a tire having a number of plies in the carcass to be tested; clock means, to control the frequency of the electrical pulses; a receiver transducer mounted relative to the transmitter transducer to receive ultrasonic energy reflected by the tire; amplifier means connected to the receiver transducer to receive reflected ultrasonic …

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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

  • Granted February 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 17, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 15, 1977
GrantedFebruary 17, 1981
Term endedFebruary 17, 1998
Patent numberCA 1096033 A
Classification (IPC)G01N29/04 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedMarch 15, 1977Patent grantedFeb 17, 1981Term endedFeb 17, 1998

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.