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

Patent Owner(s)

Patent Owner	Address
COVESTRO DEUTSCHLAND AG	KAISER-WILHELM-ALLEE LEVERKUSEN GA 51373

International Classification(s)

• C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bittner, (Deceased) Juergen	Leverkusen, DE	1	0
Leidig, Thorsten	Duisburg, DE	7	6
Runowski, Thomas	Hilden, DE	7	6
Soppe, Alfred	Issum, DE	14	31
Steffens, Friedhelm	Leverkusen, DE	44	236
Werner, Knud	Krefeld, DE	23	83

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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	Jan 5, 2026
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jan 5, 2030

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
July 05, 2018	US,20180186633,A1   US20180186633A1	FIRST PUBLISHED PATENT APPLICATION
July 03, 2018	US,10011484,B1   US10011484B1	GRANTED PATENT AS FIRST PUBLICATION

Full Text

US Patent Application No: 2018/0186,633

PROCESS FOR PURIFYING RAW-MATERIAL GASES BY FRACTIONATION

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