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

Patent Owner(s)

Patent Owner	Address
LT MATERIALS CO LTD	YONGIN-CITY

International Classification(s)

• H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
• C07D:HETEROCYCLIC COMPOUNDS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Heo, Yu-Jin	Osan-si, KR	11	2
Jeong, Won-Jang	Hwaseong-si, KR	60	18
La, Hyun-Ju	Osan-si, KR	16	42

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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	Apr 18, 2026
7.5 Year Payment	$3600.00	$1800.00	$900.00	Apr 18, 2030
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Apr 18, 2034

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
October 18, 2022	US,11472817,B2   US11472817B2	GRANTED PATENT AS SECOND PUBLICATION
August 13, 2020	US,20200255452,A1   US20200255452A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 11472817

Heterocyclic compound and organic light-emitting device comprising same

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