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

Patent Owner(s)

Patent Owner	Address
OTSUKA PHARMACEUTICAL CO LTD	JAPAN

International Classification(s)

• A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
• C12Q:MEASURING OR TESTING PROCESSES INVOLVING ENZYMES O....
• G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
• A61B:DIAGNOSIS; SURGERY; IDENTIFICATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
AKAMATSU, Suguru	Osaka, JP	9	13
INADA, Makoto	Osaka, JP	35	106
KUNIZAKI, Jun-ichi	Osaka, JP	7	10
llZUKA, Shinji	Osaka, JP	1	0
TOBITA, Kazuki	Osaka, JP	6	8

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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	Jul 4, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jul 4, 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: 2018/0003,695

METHOD FOR QUANTITATIVE MEASUREMENT OF GASTRIC ACIDITY USING 13C CARBONATE SALT

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