Steven W Spence

US Patent:

D521791, May 30, 2006

Filed:

Apr 11, 2005

Appl. No.:

29/227327

Inventors:

Steven W. Spence - Butler PA, US

Assignee:

OEM, Shades, Inc. - Ford City PA

International Classification:

0610

US Classification:

D 6580

US Patent:

D541567, May 1, 2007

Filed:

Mar 20, 2006

Appl. No.:

29/256319

Inventors:

Steven W. Spence - Butler PA, US

Assignee:

OEM Shades, Inc. - Ford City PA

International Classification:

0610

US Classification:

D 6580

US Patent:

20070267594, Nov 22, 2007

Filed:

May 17, 2006

Appl. No.:

11/435625

Inventors:

Mark A. Fanton - Cabot PA, US
Steven W. Spence - Cabot PA, US
Joseph F. Huth - Butler PA, US

International Classification:

H01F 1/00

US Classification:

252 6262, 252 6259

Abstract:

Ferrite materials are disclosed, comprising, as main components, an amount of iron component ranging from 51.0 to 59.0 mole percent calculated as FeO, an amount of manganese component ranging from 38.0 to 47.0 mole percent calculated as MnO, and an amount of zinc component ranging from 1.0 to 3.0 mole percent calculated as ZnO. Embodiments provided herein also include, as minor components, an amount of calcium component ranging from 0.010 to 0.060 weight percent calculated as CaO, an amount of silicon component ranging from 0.005 to 0.040 weight percent calculated as SiO, and, optionally, an amount of niobium component ranging up to 0.040 weight percent calculated as NbO, an amount of zirconium component ranging up to 0.050 weight percent calculated as ZrO, and an amount of tantalum component ranging up to 0.060 weight percent calculated as TaO. Methods of forming the ferrite materials and products formed therefrom are also disclosed herein. The sintered material may have a power loss of less than 1000 mW/cmat a frequency of 500 kHz and a magnetic flux density of at least 4000 G at a temperature of 100 C.