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

Patent Owner(s)

Patent Owner	Address
AKZO NOBEL N V	HOLLAND ARNHEM

International Classification(s)

• F17D:PIPE-LINE SYSTEMS; PIPE-LINES
• B01F:MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
• C11D:DETERGENT COMPOSITIONS
• B01D:SEPARATION
• C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hellsten, Martin	Ödsmål, SE	19	115
Oskarsson, Hans	Stenungtsund, SE	9	18

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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
February 19, 2013	US,8375971,B2   US8375971B2	GRANTED PATENT AS SECOND PUBLICATION
October 13, 2011	US,20110247699,A1   US20110247699A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8375971

Use of a zwitterionic surfactant together with an anionic ether-containing surfactant as a drag-reducing agent

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