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

Patent Owner(s)

Patent Owner	Address
CONSTRUCTION RESEARCH & TECHNOLOGY GMBH	83308 TROSTBERG

International Classification(s)

• C07D:HETEROCYCLIC COMPOUNDS

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• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
KIERAT, Radoslaw	Altenmarkt, DE	17	39
MECFEL-MARCZEWSKI, Joanna	Tacherting, DE	11	30
MEZGER, Jochen	Lautersheim, DE	27	112
STAUDHAMER, Rosita	Ampfing, DE	3	24
WALTHER, Burkhard	Garching, DE	38	134

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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	Feb 14, 2026

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

Full Text

US Patent Application No: 2014/0228,583

2-Oxo-1, 3-dioxolane-4-carboxylic Acid and Derivatives Thereof, Their Preparation and Use

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