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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

• SHOWA DENKO K.K.

International Classification(s)

• H01F:MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF M....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hasegawa, Hiroshi	Tokyo, JP	565	7280
Nakajima, Kenichiro	Tokyo, JP	53	824
Sasaki, Shiro	Tokyo, JP	25	203

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
December 07, 2010	US,7846273,B2   US7846273B2	GRANTED PATENT AS SECOND PUBLICATION
May 03, 2007	US,20070095438,A1   US20070095438A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7846273

R-T-B type alloy, production method of R-T-B type alloy flake, fine powder for R-T-B type rare earth permanent magnet, and R-T-B type rare earth permanent magnet

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