Method for purification of exhaust gas and apparatus therefor
CA 2033241 A1 · Owner: Muraoka, Shigehisa · Inventors: Muraoka, Shigehisa; Tsuchitani, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the purification of the exhaust gas which comprises passing the exhaust gas through a catalytic system having disposed on the exhaust gas inlet side a first catalyst produced by depositing a catalytic substance on at least one metallic substrate selected from the group consisting of metal nets and perforated metal sheets and on the exhaust gas outlet side a second catalyst produced by depositing a catalytic substance on a honeycomb shaped monolithic carrier and an apparatus therefor.
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 December 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2012.
- 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.