Method of treating exhaust gas
CA 2018356 C · Owner: Ngk Insulators, Ltd. · Inventors: Hara, Katsunosuke; Sano, Kunio; Inoue, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst composition comprising component A and component B, said component A being a carrier preferably having a honeycomb structure and being, a single-component oxide or a multi-component composite oxide of at least one metal of titanium silicon and, zirconium, and said component B being a catalyst component deposited on the carrier of component A and being at least one member selected from the group consisting of noble metals and other specifically limited metals and their oxides, is very effective for decomposing and removing poisonous organic chlorine compounds, such as dioxin and the like or poisonous, organic chlorine compound-forming substances contained in an exhaust gas …
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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 6, 1990 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 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.