Catalyst for purification of exhaust gas from diesel engine
CA 2015991 C · Owner: Saito, Koichi · Inventors: Horiuchi, Makoto; Saito, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst for purification of exhaust gas from Diesel engine wherein catalyst component containing (a) refractory inorganic oxide, (b) oxide of at least one element selected from the group consisting of praseodymium, neodymium and samarium, and (c) at lest one noble metal selected from the group consisting of platinum palladium and rhodium provided that palladium is never selected alone is borne on refractory three-dimensional structure.
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 May 3, 1990 and granted November 19, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.