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

Patent Owner(s)

Patent Owner	Address
KISHIDA CHEMICAL CO LTD	3-1 HONMACHIBASHI CHUO-KU OSAKA 540-0029

International Classification(s)

• C07D:HETEROCYCLIC COMPOUNDS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Maruoka, Keiji	Kyoto, JP	19	94
Nishimoto, Yukifumi	Kobe, JP	9	28
Yamamoto, Kenichiro	Kobe, JP	17	108

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jun 24, 2025

Fee	Large entity fee	small entity fee	micro entity fee
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
December 24, 2013	US,8614316,B2   US8614316B2	GRANTED PATENT AS SECOND PUBLICATION
October 29, 2009	US,20090270614,A1   US20090270614A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8614316

Optically active quaternary ammonium salt having axial asymmetry and process for producing α-amino acid and derivative thereof with the same

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