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Expired Canadian patentCanada

Catalyst for reductive conversion of nitrogen oxides in waste gases

CA 1294601 C · Owner: Glinski, Marek · Inventors: Baiker, Alfons; Dollenmeier, Peter; Glinski, Marek

CIPO record

Overview

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Abstract From the Canadian patent

A catalyst is disclosed for the reductive conversion of nitrogen oxides, optionally accompanied by sulfur dioxides, in waste gases. The catalyst is produced by the impregnation of a support, for example a TiO2 support, with a vanadium alkoxide, and treatment of the impregnated support in an oxygen-containing gas current. The catalyst brings about a conversion of the nitrogen oxides even at relatively low temperatures in the range of 150°C to 350°C.

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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 January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 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.
FiledApril 2, 1987
GrantedJanuary 21, 1992
Term endedJanuary 21, 2009
Patent numberCA 1294601 C
Classification (IPC)B01J23/22 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 2, 1987Patent grantedJan 21, 1992Term endedJan 21, 2009

Sources & verification

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