Method for catalytically processing gases with a high oxygen content to reduce nitrogen oxide emissions
CA 2230714 C · Owner: Barthe, Philippe · Inventors: Hedouin, Catherine; Barthe, Philippe; Seguelong, Thierry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for catalytically processing gases with a high oxygen content to reduce nitrogen oxide emissions by using a catalytic composition including manganese oxide and at least one oxide selected from cerium oxide and zirconium oxide. Said composition may further include at least one additional element from groups VIII IB, IVB and VB. Said method is particularly suitable for processing exhaust gases from internal combustion engines especially diesel or lean-burn engines.
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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
- Filed September 16, 1996 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.