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Expired Canadian patentCanada

Sonic interference suppressor

CA 1056492 A · Owner: Uss Engineers And Consultants · Inventors: Patsey, John A.

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 sonic interference suppressor has a wiper of flexible material for wiping loose foreign material an d excess water from a weld during ultrasonic inspection of the weld. A thin film of water between the contour conforming wiper and the weld passes unwanted ultrasonic energy into the wiper and on into foamed backing material.

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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 June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJune 12, 1979
Term endedJune 12, 1996
Patent numberCA 1056492 A
Classification (IPC)G01B17/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJune 12, 1979Term endedJune 12, 1996

Sources & verification

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