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

Patent Owner(s)

Patent Owner	Address
EARTH TOOL COMPANY LLC	38446 VALLEY ROAD OCONOMOWOC WI 53066

International Classification(s)

• F16L:PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR ....
• E21B:EARTH OR ROCK DRILLING

• 2014 Application Filing Year
• F16L Class
• 1655 Applications Filed
• 1375 Patents Issued To-Date
• 83.09 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Crane, Robert F	Oconomowoc, US	88	1155
# of filed Patents : 88 Total Citations : 1155

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Patent Citation Ranking

• 4 Citation Count
• F16L Class

• 9.27 % this patent is cited more than
• 11 Age

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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	Mar 11, 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: 2014/0251,694

Directional Boring Tooling Reed Type Checkflow Valve

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Abstract

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A pipe joint used in horizontal direction drilling operations having a removable valve assembly secured between the pin of a first member and the socket of a second member. The valve assembly reduces backflow of drilling fluid uphole of the downhole tool and reduces the risk of malfunction due to clogging of tooling.

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Description

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Claims

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