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

Patent Owner(s)

Patent Owner	Address
KUREHA CORPORATION	3-3-2 NIHONBASHI-HAMACHO CHUO-KU TOKYO 103-8552

International Classification(s)

• C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
• E21B:EARTH OR ROCK DRILLING
• B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
• C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....

• 2015 Application Filing Year
• C09K Class
• 2848 Applications Filed
• 2073 Patents Issued To-Date
• 72.79 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
OKURA, Masayuki	Tokyo, JP	31	287
# of filed Patents : 31 Total Citations : 287
TAKAHASHI, Shinya	Tokyo, JP	157	1663
# of filed Patents : 157 Total Citations : 1663
TAKAHASHI, Takeo	Tokyo, JP	97	813
# of filed Patents : 97 Total Citations : 813

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Patent Citation Ranking

• 41 Citation Count
• C09K Class

• 99.05 % this patent is cited more than
• 8 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	Apr 5, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Apr 5, 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

Full Text

US Patent Application No: 2017/0284,167

DOWNHOLE TOOL CONTAINING DOWNHOLE-TOOL MEMBER CONTAINING REACTIVE METAL AND DOWNHOLE-TOOL MEMBER CONTAINING DEGRADABLE RESIN COMPOSITION, AND WELL-DRILLING METHOD

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Abstract

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A downhole tool, provided with: a downhole-tool member containing a reactive metal; a downhole-tool member containing a degradable resin composition that promotes degradation of the reactive metal, preferably a degradable resin composition containing a degradable resin that generates an acid by degradation or a degradable resin composition containing a degradable resin and an inorganic substance or organic substance that promotes degradation of the reactive metal; and, as desired, a degradable rubber member. Moreover, a well-drilling method using this downhole tool.

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Description

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Claims

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