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

Patent Owner(s)

Patent Owner	Address
EVONIK OPERATIONS GMBH	ESSEN

International Classification(s)

• C07C:ACYCLIC OR CARBOCYCLIC COMPOUNDS

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Cassens, Jan	Recklinghausen, DE	2	14
# of filed Patents : 2 Total Citations : 14
Hengstermann, Axel	Senden, DE	17	224
# of filed Patents : 17 Total Citations : 224
Jansen, Robert	Bottrop, DE	82	828
# of filed Patents : 82 Total Citations : 828
Kohlstruk, Stephan	Gladbeck, DE	59	522
# of filed Patents : 59 Total Citations : 522
Mueller, Anja	Dortmund, DE	9	31
# of filed Patents : 9 Total Citations : 31
Nitz, Joerg-Joachim	Essen, DE	8	42
# of filed Patents : 8 Total Citations : 42

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Patent Citation Ranking

• 6 Citation Count
• C07C Class

• 49.72 % this patent is cited more than
• 7 Age

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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 30, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jul 30, 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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
January 30, 2018	US,9878979,B2   US9878979B2	GRANTED PATENT AS SECOND PUBLICATION
June 01, 2017	US,20170152217,A1   US20170152217A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9878979

Fine purification of isophoronenitrile by melt crystallization

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