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:
Jun. 03, 2008
Filed:
Mar. 17, 2005
Satoko Arai, Ibaraki, JP;
Mikio Kishimoto, Ibaraki, JP;
Kenji Kohno, Ibaraki, JP;
Masahiro Kusumoto, Tsuruga, JP;
Yoshiaki Nishiya, Tsuruga, JP;
Satoko Arai, Ibaraki, JP;
Mikio Kishimoto, Ibaraki, JP;
Kenji Kohno, Ibaraki, JP;
Masahiro Kusumoto, Tsuruga, JP;
Yoshiaki Nishiya, Tsuruga, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
The present invention provides composite particles which have magnetism and simultaneously emit fluorescence with a variety of wavelengths, and which are suitable for use in the fields of biology, biochemistry or the like. The composite particles of the present invention comprise ferromagnetic iron oxide particles, fluorescent pigment particles and silica, and have an average particle size of 1 to 10 μm, a coercive force of 2.39 to 11.94 kA/m (30 to 150 oersted), saturation magnetization of 0.5 to 40 A.m/kg (0.5 to 40 emu/g). The peak value of the wavelength of fluorescence from the composite particle is in the range of 350 to 750 nm, when the composite particle is excited by light with a wavelength of 250 to 600 nm.