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

Patent Owner(s)

Patent Owner	Address
RWE POWER AKTIENGESELLSCHAFT	45128 ESSEN

International Classification(s)

• F22G:SUPERHEATING OF STEAM
• F01K:STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PL....
• F26B:DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQU....
• F22B:METHODS OF STEAM GENERATION; STEAM BOILERS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Block, Ditmar	Cologne, DE	1	6
Klutz, Hans-Joachim	Erfstadt, DE	6	16

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Nov 5, 2026

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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
May 05, 2015	US,9021809,B2   US9021809B2	GRANTED PATENT AS SECOND PUBLICATION
August 26, 2010	US,20100212320,A1   US20100212320A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9021809

Method for operating a steam turbine power plant and also device for generating steam

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