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Expired Canadian patentCanada

Apparatus and method for geochemical prospecting

CA 1256218 A · Owner: Colorado School Of Mines · Inventors: Voorhees, Kent J.; Klusman, Ronald W.

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

An apparatus and method for detecting and mapping volatile species emanating from an underground source. A mass spectrometer is used for species identification and multivariate statistics are employed to define the source of the species.

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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 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 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 19, 1985
GrantedJune 20, 1989
Term endedJune 20, 2006
Patent numberCA 1256218 A
Classification (IPC)G01V9/00

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 19, 1985Patent grantedJune 20, 1989Term endedJune 20, 2006

Sources & verification

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