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Expired Canadian patentCanada

Process for reducing no emissions

CA 1181572 A · Owner: Exxon Research And Engineering Company · Inventors: Dean, Anthony M.

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

An improved non-catalytic combustion process for reducing NO emissions to the atmosphere wherein a reducing gas comprising ammonia, either alone or in combination with one or more other reducing gases, is injected into a flowing combustion effluent containing NO and oxygen when at least a portion of the combustion effluent is in a reduction zone at a temperature within the range of about 700°C to about 1100°C, and placing a metallic material substantially at the end of the reduction zone to substantially reduce ammonia breakthrough.

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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 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 16, 1982
GrantedJanuary 29, 1985
Term endedJanuary 29, 2002
Patent numberCA 1181572 A
Classification (IPC)B01D53/34 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedAug 16, 1982Patent grantedJan 29, 1985Term endedJan 29, 2002

Sources & verification

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