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Expired Canadian patentCanada

Method and apparatus for testing the outflow from hydrocarbon wells on site

CA 1255798 A · Owner: Chevron Research And Technology Company · Inventors: Bocek, John R.; Canfield, Dennis R.; Liu, Ke-Tien

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

A portable instrument for testing at the wellhead continuously, or a stationary instrument for use at a production battery, the outflow of crude hydrocarbons from the well or wells. The invention utilizes a simple relationship of density and thermal coefficients of expansion of the oil and the water, together with improved instrumentation to measure mass flow rate of the crude mixture, to produce accurate continuous readings of oil and water contents in the crude. The invention depends upon state of the art technology both as to the crude handling and the electronics portions of its apparatus.

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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 13, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 13, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 23, 1986
GrantedJune 13, 1989
Term endedJune 13, 2006
Patent numberCA 1255798 A
Classification (IPC)G01F1/86 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedJune 23, 1986Patent grantedJune 13, 1989Term endedJune 13, 2006

Sources & verification

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