Method of decomposing nitrogen dioxide
CA 2582935 C · Owner: Werth, Peter · Inventors: O'Sullivan, Richard Dominic; Werth, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of decomposing NO2 to NO in an exhaust gas of a lean-bum internal combustion engine comprises the steps of contacting an acidic metal oxide selected from the group consisting of zeolites tungsten-doped titania, silica-, titania zirconia-titania, gamma-alumina, amorphous silica-alumina and mixtures of any two or more thereof with a gas mixture comprising the exhaust gas, adjusting the composition of the gas mixture by injecting hydrocarbon , therein at a rate that changes over the course of a duty cycle so that on , average over the duty cycle, the Cl hydrocarbon : nitrogen oxides ratio of the gas mixture contacting the acidic metal oxide is from 0.1 to 2.0 and passing the …
Read the whole patent
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 October 10, 2005 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.