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:
Mar. 30, 1993
Filed:
Oct. 11, 1991
Applicant:
Inventors:
Shigehisa Yamamoto, Hiroshima, JP;
Masaru Kawabata, Hiroshima, JP;
Assignee:
Toda Kogyo Corp., Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C04B / ; H01F / ;
U.S. Cl.
CPC ...
252 6254 ; 252 6256 ; 252 6262 ;
Abstract
Disclosed herein are ferrite particles for a bonded magnetic core comprising crystal grains of 5 to 15 .mu.m in average diameter, having an average particle diameter of 20 to 150 .mu.m and a magnetic permeability of not less than 24, and consisting essentially of 47 to 58 mol % of Fe.sub.2 O.sub.3, 10 to 30 mol % of nickel oxide, manganese oxide, nickel-managanese oxide (calculated as NiO, MnO or NiO.MnO) and 15 to 40 mol % of zinc oxide (calculated as ZnO).