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. 16, 2021
Filed:
Dec. 12, 2017
Applicant:
Powdertech Co., Ltd., Chiba, JP;
Inventors:
Koji Aga, Chiba, JP;
Takashi Kojima, Chiba, JP;
Assignee:
POWDERTECH CO., LTD., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01); C01G 49/02 (2006.01); F16D 69/02 (2006.01);
U.S. Cl.
CPC ...
C01G 49/02 (2013.01); F16D 69/027 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01); C01P 2006/42 (2013.01); C01P 2006/62 (2013.01); F16D 2200/0043 (2013.01);
Abstract
Provided is an iron oxide powder for a brake friction material which can be suitably used in a brake friction material that is less likely to cause problems regarding brake squealing and that provides superior braking performance. The iron oxide powder for a brake friction material according to the present invention is characterized by having an average particle size of 40 μm or more and a saturation magnetization of 20 emu/g or less. The iron oxide powder preferably has a pore volume of 10-180 mm/g. The iron oxide powder also preferably has a BET specific surface area of 0.05-1.20 m/g.