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

Patent Owner(s)

Patent Owner	Address
NATIONAL INSTITUTE FOR RESEARCH IN INORGANIC MATERIALS	TSUKUBA-SHI IBARAKI 305

International Classification(s)

• C04B:LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREO....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
He, Hongliang	Ibaraki, JP	5	4
Kimoto, Koji	Ibaraki, JP	7	92
Kobayashi, Takamichi	Ibaraki, JP	4	35
Mitomo, Mamoru	Ibaraki, JP	22	705
Sekine, Toshimori	Ibaraki, JP	3	4

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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
July 08, 2003	US,6589899,B2   US6589899B2	GRANTED PATENT AS SECOND PUBLICATION
April 18, 2002	US,20020045529,A1   US20020045529A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 6589899

Spinel type sialon, spinel type silicon oxynitride and methods for producing their powders

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