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Expired Canadian patentCanada

Test head for ultrasonic testing of structural material

CA 1112352 A · Owner: Mannesmann Aktiengesellschaft · Inventors: Simoneit, Gunter; Hannoschock, Kurt; Ries, Karl

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Disclosed is a test head for ultrasonic testing of structural materials. The test head includes its own calibration device in the form of a wire or a bore in front of the transducing surface so that a distinguishable calibration echo is always available. This eliminates the need to calibrate the head by using a reference test object.

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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 November 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 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.
FiledJune 8, 1978
GrantedNovember 10, 1981
Term endedNovember 10, 1998
Patent numberCA 1112352 A
Classification (IPC)G01N29/04 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJune 8, 1978Patent grantedNov 10, 1981Term endedNov 10, 1998

Sources & verification

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