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Expired Canadian patentCanada

Reference element for adjusting ultrasonic test equipment

CA 1094676 A · Owner: Mannesmann Aktiengesellschaft · Inventors: Lather, Dieter; Terschuren, Wolfgang; Ries, Karl

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A tubular sleeve with reflector body water ingress and venting, openings is used to produce specific echos of a test signal launched by an inserted transducer. Amplitude and transit time of the element serve as a transferable standard.

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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 January 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 27, 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.
FiledAugust 5, 1977
GrantedJanuary 27, 1981
Term endedJanuary 27, 1998
Patent numberCA 1094676 A
Classification (IPC)G01N29/00 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedAug 5, 1977Patent grantedJan 27, 1981Term endedJan 27, 1998

Sources & verification

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