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

Patent Owner(s)

Patent Owner	Address
SHELL OIL COMPANY	HOUSTON TX

International Classification(s)

• E21B:EARTH OR ROCK DRILLING

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Brisco, David Paul	Duncan, OK	112	4204
Cook, Robert Lance	Katy, TX	134	4674
Duell, Alan B	Duncan, OK	43	1436
Filippov, Andrei Gregory	Katy, TX	45	1284
Ring, Lev	Houston, TX	188	5787

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
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 02, 2006	US,7036582,B2   US7036582B2	GRANTED PATENT AS SECOND PUBLICATION
May 22, 2003	US,20030094277,A1   US20030094277A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7036582

Expansion cone for radially expanding tubular members

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