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:
Apr. 20, 2004
Filed:
Apr. 04, 2001
Applicant:
Inventors:
Hiroaki Mashiko, Osaka, JP;
Hiroyuki Nishii, Osaka, JP;
Assignee:
Nitto Denko Corporation, Ibaraki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 3/916 ;
U.S. Cl.
CPC ...
B01D 3/916 ;
Abstract
An air-permeable filter for an ink cartridge includes at least one porous material layer including at least one resin selected from the group including fluororesin and polyolefin resin, and at least one air-permeable substrate layer having a tensile strength of 1 MPa or more. In addition, an ink cartridge includes a space for receiving an ink and at least one air vent in which the air-permeable filter is provided.