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:
Aug. 09, 1994
Filed:
Oct. 27, 1992
Yoshiaki Kintaichi, Ibaraki, JP;
Hideaki Hamada, Ibaraki, JP;
Takehiko Ito, Ibaraki, JP;
Motoi Sasaki, Ibaraki, JP;
Mitsunori Tabata, Saitama, JP;
Kazushi Usui, Chiba, JP;
Agency of Industrial Science and Technology, Tokyo, JP;
Cosmo Research Institute, Tokyo, JP;
Abstract
A process for reducing nitrogen oxides to nitrogen from exhaust gases is disclosed, which involves bringing an exhaust gas containing nitrogen oxides into contact with at least one catalyst from proton-type zeolites, zeolites of an alkali metal exchanged form and acidic metal oxides, by reaction with a hydrocarbon or an oxygen-containing organic compound in an oxidizing atmosphere containing excess oxygen. A process which further involves bringing the exhaust gas into contact with an oxidizing catalyst subsequent to the above process.