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Expired Canadian patentCanada

Determination of electrochemically active components in a process stream

CA 1263441 C · Owner: Knight, Roger W. · Inventors: Knight, Roger W.; Bond, Alan M.; Newman, Oliver M.G.

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Abstract From the Canadian patent

A method and apparatus for determining electrochemically active components in a process stream. The method comprises the steps of providing a sample in which the components are contained and, depositing the components onto a working electrode altering the environment of the working electrode so that it is immersed in a supporting electrolyte by effecting a matrix exchange and stripping the deposited electrochemically active components from the working electrode into the supporting electrolyte. The method and apparatus utilize a measurement cell which comprises a vessel for containing the supporting electrolyte and a mercury drop electrode. A flow injector is used to inject a flow of a …

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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 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 28, 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.
FiledJuly 23, 1987
GrantedNovember 28, 1989
Term endedNovember 28, 2006
Patent numberCA 1263441 C
Classification (IPC)G01N27/42

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedJuly 23, 1987Patent grantedNov 28, 1989Term endedNov 28, 2006

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