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Expired Canadian patentCanada

Method and apparatus for introduction of a particulate sample for analysis

CA 1291930 C · Owner: Guevremont, Roger · Inventors: Guevremont, Roger; De Silva, K. Nimalasiri

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

A method and apparatus for delivering a particulate sample to an analyzing device such as a flame or plasma spectrometer which provides relatively uniform, continuous and controlled delivery of a sample and allows sample changing without disrupting the operation of the analyzing device.

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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 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2008.
  • 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 12, 1986
GrantedNovember 12, 1991
Term endedNovember 12, 2008
Patent numberCA 1291930 C
Classification (IPC)G01N1/00

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 12, 1986Patent grantedNov 12, 1991Term endedNov 12, 2008

Sources & verification

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