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

Patent Owner(s)

Patent Owner	Address
CHINA PETRO-CHEMICAL CORPORATION	6A HUIXIN DONG STREET CHAOYANG DISTRICT BEIJING CHINA 100029

International Classification(s)

• C07C:ACYCLIC OR CARBOCYCLIC COMPOUNDS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Li, Chuanzhao	Tianjin, CN	5	28
Liu, Zongzhang	Tianjin, CN	4	37
Qian, Shenghua	Tianjin, CN	4	27
Tan, Qiu	Tianjin, CN	3	30
Yu, Shenbo	Tianjin, CN	14	165
Zhang, Minhua	Tianjin, CN	18	33

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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

Full Text

US Patent No: 5648561

Process for the production of high purity and ultrapure bisphenol-A

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