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

Patent Owner(s)

Patent Owner	Address
DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO LTD	22 DOOSANVOLVO-RO SEONGSAN-GU CHANGWON-SI GYEONGSANGNAM-DO 51711

International Classification(s)

• F01K:STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PL....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
KANG, Sang Wook	Gyeongsangnam-do, KR	14	148
LEE, Je Young	Busan, KR	4	1
LEE, Seung Chul	Seoul, KR	82	370
SON, Hyun Woo	Gyeonggi-do, KR	5	7
YANG, Seong Jong	Gyeongsangnam-do, KR	2	2

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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	Jun 28, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jun 28, 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

Full Text

US Patent Application No: 2017/0370,252

APPARATUS FOR REDUCING WINDAGE LOSS OF STEAM TURBINES

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