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

Patent Owner(s)

Patent Owner	Address
BERKENHOFF GMBH	35452 HEUCHELHEIM

International Classification(s)

• C25D:PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC ....
• B23H:WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRA....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
CHEN, Yibo	Ningbo, CN	21	36
GU, Hongfang	Ningbo, CN	1	0
HU, Meijun	Ningbo, CN	1	0
LIANG, Zhining	Ningbo, CN	3	7
LIN, Huogen	Ningbo, CN	3	0
MENG, Xianqui	Ningbo, CN	1	0
NÖTHE, Tobias	Herborn, DE	4	9
WU, Tong	Ningbo, CN	171	1394

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
3.5 Year Payment	$1600.00	$800.00	$400.00	Feb 18, 2026
7.5 Year Payment	$3600.00	$1800.00	$900.00	Feb 18, 2030
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Feb 18, 2034

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 3.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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: 2022/0258,262

WIRE ELECTRODE FOR WIRECUT ELECTRICAL DISCHARGE MACHINING WITH CARBONACEOUS SURFACE LAYER AND THE PREPARATION METHODS THEREOF

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