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:
May. 01, 2001
Filed:
Apr. 27, 1999
Applicant:
Inventors:
Masaru Okamoto, Kawasaki, JP;
Katsuya Okamura, Inagi, JP;
Choji Yamazaki, Ome, JP;
Hiroyuki Yasui, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 1/908 ; B01J 1/912 ;
U.S. Cl.
CPC ...
B01J 1/908 ; B01J 1/912 ;
Abstract
In an exhaust gas processing apparatus for an internal combustion engine, supply power is fed to a corona discharge tube via a short-pulse high-repetition switching element to produce a corona. A harmful substance in exhaust gas of the internal combustion engine is removed by the corona. An MAGT (MOS Assisted Gate-Triggered Thyristor) is used as the short-pulse high-repetition switching element. Thus, the life of the switching element is increased and a high purification performance is achieved even at the time of start of operation when the temperature of exhaust gas is low.