The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2014
Filed:
Apr. 18, 2011
Shanmugam Palani Elangovan, Kameido, JP;
Tatsuya Okubo, Machida, JP;
Stacey I. Zones, San Francisco, CA (US);
Cong-yan Chen, Kensington, CA (US);
Allen W. Burton, Jr., Richmond, CA (US);
Shanmugam Palani Elangovan, Kameido, JP;
Tatsuya Okubo, Machida, JP;
Stacey I. Zones, San Francisco, CA (US);
Cong-Yan Chen, Kensington, CA (US);
Allen W. Burton, Jr., Richmond, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A method of treating a cold-start engine exhaust gas stream comprising hydrocarbons and other pollutants, the method comprising: flowing the exhaust gas stream over a molecular sieve bed, the molecular sieve bed comprising an alkali metal cation-exchanged molecular sieve having intersecting 10- and 12-membered ring pore channels, to provide a first exhaust stream; flowing the first exhaust gas stream over a catalyst to convert any residual hydrocarbons and other pollutants contained in the first exhaust gas stream to innocuous products to provide a treated exhaust stream; and discharging the treated exhaust stream into the atmosphere.