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

Patent Owner(s)

Patent Owner	Address
NATIONAL INSTITUTE OF ENVIRONMENTAL RESEARCH	42 HWANGYEONG-RO SEO-GU INCHEON 22689

International Classification(s)

• B03C:MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATE....
• B03B:SEPARATING SOLID MATERIALS USING LIQUIDS OR USING ....
• B09B:DISPOSAL OF SOLID WASTE

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
CHO, Na Hyeon	Incheon, KR	1	0
CHOI, Ja-Hyung	Incheon, KR	1	0
HONG, Soo Yeon	Incheon, KR	2	0
JEON, Tae Wan	Gyeonggi-do, KR	1	0
KANG, Young Yeul	Incheon, KR	2	1
KIM, Min-Jung	Gyeonggi-do, KR	84	1345
UM, Namil	Incheon, KR	2	1
YOON, Cheol Woo	Incheon, KR	2	1
YOON, Young Sam	Gyeonggi-do, KR	5	34

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
3.5 Year Payment	$1600.00	$800.00	$400.00	Dec 13, 2027
7.5 Year Payment	$3600.00	$1800.00	$900.00	Dec 13, 2031
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Dec 13, 2035

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 3.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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

Full Text

US Patent Application No: 2024/0189,831

PRETREATMENT METHOD FOR UTILIZATION OF COAL ASH LANDFILLED IN ASH PONDS

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