Combustion engine air supply system
CA 2320877 C · Owner: Reppert, Todd Colin · Inventors: Reppert, Todd Colin; Callaghan, Kevin Patrick; Nemser, Stuart Marshall
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of operating an internal combustion engine (21) employs a selectively gas permeable membrane unit (10) to provide either oxygen or nitrogen enriched air to reduced NOx emissions, lean burn limit increase power, and reduced , cold start emissions. The method includes separating air into an oxygen enriched fraction and nitrogen enriched fraction with a membrane unit; and feeding the nitrogen enriched fraction to the engine. The membrane has an oxygen/nitrogen selectivity of at least 1.4 and a permeability to oxygen of at least 50 barrers. The membrane is formed from an amorphous copolymer of perfluoro-2,2-dimethyl-1,3-dioxole being at a temperature below the glass transition …
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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 February 16, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2021.
- 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.