Reactivation of solid oxidation catalysts
CA 2113672 C · Owner: Huba, Francis · Inventors: Huba, Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel process and chemicals are disclosed for the rejuvenation of oxidation catalysts used to reduce the production of pollutants in the exhaust gas emanating from an internal combustion engine particularly catalysts used in theconverters of automobiles and other combustion engine powered vehicles. The rejuvenation may be done in place, within minutes without removing the holding, containers or converters or the catalyst from them. The rejuvenation is effectedby treating the used catalyst with an aqueous solution of a peroxide which is decomposable at the temperature of treatment. The concentration of solution theproportion of solution per unit volume of catalyst and the time of treatment …
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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 January 18, 1994 and granted May 13, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 2016.
- 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.