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

Patent Owner(s)

Patent Owner	Address
BERKSHIRE HATHAWAY ENERGY COMPANY	666 GRAND AVENUE SUITE 500 DES MOINES IA 50309-2580

International Classification(s)

• C22B:PRODUCTION OR REFINING OF METALS
• C25B:ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE ....
• C02F:TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE....
• B01D:SEPARATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Featherstone, John L	El Centro, US	38	661
Furmanski, George	La Quinta, US	5	94

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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	May 25, 2026

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
November 25, 2014	US,8894865,B2   US8894865B2	GRANTED PATENT AS SECOND PUBLICATION
March 21, 2013	US,20130068697,A1   US20130068697A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8894865

Process for depleting calcium and/or iron from geothermal brines

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