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

Patent Owner(s)

Patent Owner	Address
POSCO CO LTD	POHANG-SI GYEONGSANGBUK-DO 37859

International Classification(s)

• B22D:CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY ....
• C22C:ALLOYS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Ha, Man Jin	Pohang-si, KR	5	0
Hwang, Suk Kyun	Pohang-si, KR	10	1
Kim, Jin Ho	Pohang-si, KR	333	1912
Park, Sung Jin	Pohang-si, KR	193	938

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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	Nov 22, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Nov 22, 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
May 22, 2018	US,9975170,B2   US9975170B2	GRANTED PATENT AS SECOND PUBLICATION
June 16, 2016	US,20160167120,A1   US20160167120A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9975170

Method for manufacturing duplex stainless steel sheet having high nitrogen content and good surface quality

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