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

Patent Owner(s)

Patent Owner	Address
BAKER HUGHES HOLDINGS LLC	17021 ALDINE WESTFIELD HOUSTON TX 77073

International Classification(s)

• C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
• E21B:EARTH OR ROCK DRILLING

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Carman, Paul	Spring, US	7	55
Chetty, Madhukar	Houston, US	15	104
Gupta, D V Satyanarayana	The Woodlands, US	110	1341

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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
June 07, 2011	US,7956012,B2   US7956012B2	GRANTED PATENT AS SECOND PUBLICATION
August 05, 2010	US,20100197530,A1   US20100197530A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7956012

Oil field treatment fluids with viscosified brines

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