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Expired Canadian patentCanada

Testing of interiors of pressure vessels

CA 1066775 A · Owner: Foster Wheeler Energy Corporation · Inventors: Bromwich, Robert A.C.

CIPO record

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

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Abstract From the Canadian patent

Described herein is apparatus for use in testing a shell from its interior in the region of a bore through that shell. The apparatus includes a rotatable stem which is inserted into the bore and an arm carried on the inner end of this stem. This arm includes guide means by which a testing probe is supported and constrained to move between extreme positions where the probe is normal to the interior surface of the shell and where the probe is within the bore and normal to the surface of the bore; the guide means are therefore shaped to correspond to the profile of the surface of the region under test. In use the stem and arm are rotated to orbit the testing probe around the axis of the bore …

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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 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 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—
GrantedNovember 20, 1979
Term endedNovember 20, 1996
Patent numberCA 1066775 A
Classification (IPC)G01N27/82 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 20, 1979Term endedNov 20, 1996

Sources & verification

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