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:
Feb. 07, 2023
Filed:
Aug. 11, 2020
Applicant:
Ngk Insulators, Ltd., Nagoya, JP;
Inventor:
Koji Hieda, Toki, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 71/02 (2006.01); B01D 67/00 (2006.01); B01D 69/04 (2006.01);
U.S. Cl.
CPC ...
B01D 71/025 (2013.01); B01D 67/0083 (2013.01); B01D 69/043 (2013.01); B01D 2323/08 (2013.01); B01D 2325/02 (2013.01);
Abstract
A base material for a membrane filter contains 90% by mass or more of aluminum oxide and 0.1% by mass or more and 10% by mass or less of titanium oxide. In a pore distribution curve measured by a mercury porosimeter, the base material has a first peak and a second peak which is higher than the first peak and is located at a pore size larger than that of the first peak, and the volume of pores with a pore size of 7 μm or more is 0.02 cm/g or more.