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

Patent Owner(s)

Patent Owner	Address
TATA STEEL LIMITED	RESEARCH AND DEVELOPMENT AND SCIENTIFIC SERVICES JAMSHEDPUR 831001

International Classification(s)

• B03D:FLOTATION; DIFFERENTIAL SEDIMENTATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Banerjee, Pradip Kumar	Jamshedpur, IN	6	20
Bhattacharjee, Debashish	Jamshedpur, IN	10	57
Gupta, Ashiwani K	Jamshedpur, IN	1	1

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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	Dec 25, 2024

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
June 25, 2013	US,8469197,B2   US8469197B2	GRANTED PATENT AS SECOND PUBLICATION
July 22, 2010	US,20100181520,A1   US20100181520A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8469197

Blended frother for producing low ash content clean coal through flotation

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