Platinum-rhodium catalyst for automotive emission control
CA 1102299 A · Owner: General Motors Corporation · Inventors: Summers, Jack C.; Hegedus, Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A 3-way layered catalyst adapted for use in a system operating at about the stoichiometric air/fuel ratio having significantly improved resistance to poisoning in automotive exhaust comprising an alumina support having a first layer of the catalyst material platinum positioned at the support surface and penetrating the body thereof to a desired depth with an inner second layer of the catalyst material rhodium the second, layer being adjacent to the first layer and penetrating the body of the support, the maximum concentration of platinum being at or near the surface of the support with the minimum concentration of rhodium in the first layer being at or close to …
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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
- Granted June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
- 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.