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. 17, 2012
Filed:
Feb. 12, 2008
Shin-ichiro Yokoyama, Minato-ku, JP;
Yasuyuki Ilda, Yasugi, JP;
Hakaru Sasaki, Yasugi, JP;
Yoji Ishikura, Yasugi, JP;
Hiromitsu Itabashi, Kumagaya, JP;
Masahiro Mita, Kumagaya, JP;
Yoshiyuki Fujihara, Yasugi, JP;
Shin-ichiro Yokoyama, Minato-ku, JP;
Yasuyuki Ilda, Yasugi, JP;
Hakaru Sasaki, Yasugi, JP;
Yoji Ishikura, Yasugi, JP;
Hiromitsu Itabashi, Kumagaya, JP;
Masahiro Mita, Kumagaya, JP;
Yoshiyuki Fujihara, Yasugi, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
Disclosed are: a magnetic shielding material having excellent magnetic shielding property at a low magnetic field; and a magnetic shielding component and a magnetic shielding room each using the magnetic shielding material. Specifically disclosed is a magnetic shielding material comprising the following components (by mass): Ni: 70.0-85.0%, Cu: 0.6% or less, Mo: 10.0% or less and Mn: 2.0% or less, with the remainder being substantially Fe. The magnetic shielding material has a relative magnetic permeability of 40,000 or more under a magnetic field of 0.05 A/m and a squareness ratio (Br/B) of 0.85 or less, wherein the squareness ratio (Br/B) is a ratio of a remanent magnetic flux density (Br) to a maximum magnetic flux density (B) in a DC hysteresis curve produced under the maximum magnetic field of 0.8 A/m.