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:
Jan. 08, 2002
Filed:
May. 01, 2000
Applicant:
Inventors:
Yutaka Atsumi, Hamakita, JP;
Jun Suzuki, Hamakita, JP;
Takeo Jo, Tokushima, JP;
Katsumi Osaka, Tokushima, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 4/600 ;
U.S. Cl.
CPC ...
B01D 4/600 ;
Abstract
The object of the present invention is to provide an air filter where the lifetime of the air filter is long and a carbon dust can be efficiently caught with keeping the cost low. The air filter of the present invention comprises a first filter layer impregnated with oil; an oil repellent layer disposed in the downstream side of the first filter layer , having the property of repelling the oil; and a second filter layer disposed in the downstream side of the oil repellent layer , impregnated with no oil. The transfer of the oil to the second filter layer is controlled by the oil repellent layer