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Expired Canadian patentCanada

Process and test kit for the detection of explosives

CA 1309933 C · Owner: Erez Forensic Technology, Ltd. · Inventors: Glattstein, Baruch

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention provides a multi-reagent test kit for the presumptive identification of traces of explosives and/or discriminating between "innocent" material and explosive containing a first reagent comprising about 2.5 to 20% V/V of a tetra alkyl ammonium or phosphonium hydroxide in a solvent comprising at least 60% V/V dimethylsulfoxide and about 0 to 30% V/V methanol or water and a second reagent comprising a diazotization compound and a coupling compound of a Griess reagent pair.

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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 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
  • 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 13, 1987
GrantedNovember 10, 1992
Term endedNovember 10, 2009
Patent numberCA 1309933 C
Classification (IPC)G01N31/22

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 13, 1987Patent grantedNov 10, 1992Term endedNov 10, 2009

Sources & verification

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