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

Patent Owner(s)

Patent Owner	Address
PETROCHINA COMPANY LIMITED	100007 NO 9 NORTH MAIN STREET DONGCHENG DISTRICT BEIJING DONGZHIMEN BEIJING CITY BEIJING CITY 100007

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
Cui, Weixiang	Beijing, CN	1	0
Guan, Baoshan	Beijing, CN	4	4
Lu, Yongjun	Beijing, CN	4	9
Qiu, Xiaohui	Beijing, CN	2	0
Yang, Jiang	Beijing, CN	60	1159

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
7.5 Year Payment	$3600.00	$1800.00	$900.00	Jul 2, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jul 2, 2029

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 7.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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
January 02, 2018	US,9856413,B2   US9856413B2	GRANTED PATENT AS SECOND PUBLICATION
November 12, 2015	US,20150322334,A1   US20150322334A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 2015/0322,334

VISCOELASTIC SURFACTANT HAVING MULTIPLE HYDROPHOBIC AND HYDROPHILIC GROUPS AS FRACTURING FLUIDS

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