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Expired Canadian patentCanada

Apparatus and methods for effluent stream analysis

CA 1099786 A · Owner: Princeton Applied Research Corporation · Inventors: Smith, John L.

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Abstract From the Canadian patent

UNITED STATES PATENT APPLICATION, of, JOHN L. SMITH for, APPARATUS AND METHODS FOR EFFLUENT STREAM ANALYSIS, ABSTRACT, An effluent delivery tube directs effluent from below mercury drops formed by a mercury drop electrode in a vertically upward direction coaxial to the vertical axis of the mercury drop to provide turbulent free flow of effluent about the drops. A method of analyzing an effluent stream by directing an effluent from below a drop formed by a mercury drop electrode in a vertically upward direction coaxial to the vertical axis of the mercury drop to provide turbulent free flow of effluent about the mercury drop.

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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 April 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 31, 1978
GrantedApril 21, 1981
Term endedApril 21, 1998
Patent numberCA 1099786 A
Classification (IPC)G01N27/48

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedOct 31, 1978Patent grantedApril 21, 1981Term endedApril 21, 1998

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