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

Patent Owner(s)

Patent Owner	Address
CHUGAI SEIYAKU KABUSHIKI KAISHA	TOKYO 115-8543

International Classification(s)

• A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
• C08B:POLYSACCHARIDES; DERIVATIVES THEREOF
• C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Nakai, Takashi	Shizuoka, JP	125	1382
Shimoboji, Tsuyoshi	Shizuoka, JP	19	232
Tampo, Yoshihiro	Shizuoka, JP	4	19
Yasugi, Kenji	Shizuoka, JP	7	68
Yasugi, Tomoko	Shizuoka, JP	3	20

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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	Jul 31, 2026
7.5 Year Payment	$3600.00	$1800.00	$900.00	Jul 31, 2030
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jul 31, 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
January 31, 2023	US,11564971,B2   US11564971B2	GRANTED PATENT AS SECOND PUBLICATION
August 20, 2015	US,20150231268,A1   US20150231268A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 2015/0231,268

HYALURONIC ACID DERIVATIVE HAVING AMINO ACID AND STERYL GROUP INTRODUCED THEREINTO

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