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Expired Canadian patentCanada

Damping pressure pulsations in piping systems

CA 1269023 C · Owner: Nova Husky Research Corporation Ltd. · Inventors: Jungowski, Wiktor M.; Studzinski, Wojciech

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

Flow-induced pressure pulsations in a piping system transporting natural gas or other gaseous medium are suppressed by disturbing the shear layer in the open end of a sidebranch line. Inserts are located in the sidebranch line to effect the shear layer disturbance.

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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 May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 23, 1986
GrantedMay 15, 1990
Term endedMay 15, 2007
Patent numberCA 1269023 C
Classification (IPC)F16L55/00

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedSep 23, 1986Patent grantedMay 15, 1990Term endedMay 15, 2007

Sources & verification

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