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Expired Canadian patentCanada

Monitoring flow-rate changes of a plurality of fluid streams

CA 1187989 A · Owner: Exxon Research And Engineering Company · Inventors: Girling, Peter M.; Lisi, Edward L.

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Abstract From the Canadian patent

Changes in the flow-rates of each one of a plurality of fluid streams which pass from respective conduits (13) to a common conduit (12) are monitored by taking a representative sample of fluid from a sampling point (16) of the common conduit determining the change, in composition of at least key components of the sample relative to a preceding sample obtained in the same manner and computing from, the change in composition the composition of the fluid stream whose flow-rate has changed, so that the fluid stream can be identified by reference to a library or database of fluid stream compositions. When the fluid streams are gases (e.g. gases to be flared at an oil refinery or chemical process …

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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 28, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 18, 1983
GrantedMay 28, 1985
Term endedMay 28, 2002
Patent numberCA 1187989 A
Classification (IPC)G01F13/00

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMay 18, 1983Patent grantedMay 28, 1985Term endedMay 28, 2002

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