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:
Oct. 06, 2009
Filed:
Feb. 20, 2008
Shinji Uemoto, Otake, JP;
Naoki Uchida, Otake, JP;
Mamoru Kamigaki, Otake, JP;
Ryo Iwai, Otake, JP;
Hiromitsu Misawa, Otake, JP;
Koso Aoki, Otake, JP;
Shinji Uemoto, Otake, JP;
Naoki Uchida, Otake, JP;
Mamoru Kamigaki, Otake, JP;
Ryo Iwai, Otake, JP;
Hiromitsu Misawa, Otake, JP;
Koso Aoki, Otake, JP;
Toda Kogyo Corporation, Hiroshima-ken, JP;
Abstract
The present invention relates to a black magnetic iron oxide particles each having a polyhedral shape wherein when a percentage of dissolution of iron element based on a total amount of iron element contained in the black magnetic iron oxide particles is 50%, a percentage of dissolution of sulfur element based on a total amount of sulfur element contained in the black magnetic iron oxide particles is less than 40%.