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

Patent Owner(s)

Patent Owner	Address
NORITZ CORPORATION	93 EDOMACHI CHUO-KU KOBE-SHI HYOGO 650-0033

International Classification(s)

• F22B:METHODS OF STEAM GENERATION; STEAM BOILERS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hamada, Tetsurou	Hyogo , JP	22	239
Hara, Hitoshi	Hyogo, JP	38	259
Takashima, Hiroaki	Hyogo, JP	45	281
Uehara, Kozo	Hyogo, JP	5	48
Yoshitomi, Hideaki	Hyogo, JP	3	53

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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
April 28, 2009	US,7523721,B2   US7523721B2	GRANTED PATENT AS SECOND PUBLICATION
September 13, 2007	US,20070209606,A1   US20070209606A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7523721

Heat exchanger and water heater

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