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

Patent Owner(s)

Patent Owner	Address
ENI S P A	ITALY ROME ROMA ROME

International Classification(s)

• E21B:EARTH OR ROCK DRILLING

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Di, Renzo Domenico	Casirate d'Adda, IT	4	7
Galgani, Giovanni	Colle di Val d'Elsa, IT	1	4
Maliardi, Alberto	San Donato Milanese, IT	5	7

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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	Nov 26, 2023
7.5 Year Payment	$3600.00	$1800.00	$900.00	Nov 26, 2027
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Nov 26, 2031

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
May 26, 2020	US,10662747,B2   US10662747B2	GRANTED PATENT AS SECOND PUBLICATION
August 17, 2017	US,20170237145,A1   US20170237145A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 2017/0237,145

Coaxially Arranged Mode Converters

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