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Expired Canadian patentCanada

Conversion of hydrocarbons and carbon monoxide in exhaust gas streams

CA 1112840 A · Owner: Union Carbide Corporation · Inventors: Wolynic, Edward T.; Bezman, Richard D.; Rabo, Jule A.

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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

The conversion of hydrocarbons and carbon monoxide in water-containing gas streams such as exhaust gases from internal combustion engines to form enviromentally innocuous products such as carbon dioxide and water is accomplished by contacting such gas streams at elevated temperatures with zeolite-based catalyst compositions which not only catalyse the oxidative combustion of the foresaid substrates that also catalyze their reaction with water.

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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 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 2, 1979
GrantedNovember 24, 1981
Term endedNovember 24, 1998
Patent numberCA 1112840 A
Classification (IPC)C01B31/20 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJan 2, 1979Patent grantedNov 24, 1981Term endedNov 24, 1998

Sources & verification

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