System for exhaust gas purification
CA 2240704 C · Owner: Mizuno, Hiroshige · Inventors: Mizuno, Hiroshige; Shibagaki, Yukinari; Noda, Naomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine includes:, an adsorbent formed by loading on a first honeycomb, carrier, an adsorbent layer containing an adsorbent component having a hydrocarbon adsorptivity and a honeycomb, heater formed by fixing to a second honeycomb carrier made, of an electrically heatable material and having a large number of passages, electrodes for electrification of the carrier, the honeycomb heater being provided downstream of the adsorbent in the flow direction of the exhaust gas emitted from the engine. In the system the adsorbent and, the honeycomb heater each have a catalyst component loaded thereon, the …
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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 June 15, 1998 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2020.
- 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.