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. 08, 2001
Filed:
Apr. 08, 1996
Applicant:
Inventors:
Takanobu Sugo, Gunma-ken, JP;
Kunio Fujiwara, Kanagawa-ken, JP;
Hideaki Sekiguchi, Chiba-ken, JP;
Takeshi Takai, Kanagawa-ken, JP;
Atsushi Kobayashi, Kanagawa-ken, JP;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 2/400 ; B01D 3/904 ; B01D 3/916 ; B01D 4/600 ;
U.S. Cl.
CPC ...
B01D 2/400 ; B01D 3/904 ; B01D 3/916 ; B01D 4/600 ;
Abstract
An air purifying filter which comprises: (a) an ion-exchange fiber filter and (b) a high- or ultrahigh-performance filter comprising glass fibers is disclosed. The ion-exchange fiber filter preferably comprises a fibrous substrate and ion-exchange groups and hydrophilic groups which are chemically bound to the surface of the substrate.