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:
Jun. 12, 2001
Filed:
Jul. 09, 1997
Applicant:
Inventors:
Tatsuro Miyazaki, Fukuoka, JP;
Nobuyuki Tokubuchi, Saga, JP;
Mashaaki Arita, Onojo, JP;
Masahiro Inoue, Kasuga, JP;
Kensei Fukuda, Saga-ken, JP;
Shouji Kuroda, Kasuga, JP;
Shoichi Shimizu, Fukuoka, JP;
Kazuhiko Noda, Chikushino, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 4/500 ; B01J 8/02 ; C01B 2/100 ; C01B 2/300 ;
U.S. Cl.
CPC ...
B01D 4/500 ; B01J 8/02 ; C01B 2/100 ; C01B 2/300 ;
Abstract
The particulates, etc. deposited on the trap are burnt in such a manner that the trap is heated so that the temperature of the trap does not exceed 500° C. or the maximum temperature gradient in radial direction of the trap is 20° C./mm or less, preferably 10° C./mm or less.