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

Patent Owner(s)

Patent Owner	Address
DB HITEK CO LTD	SEOUL

International Classification(s)

• H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Kim, Sung-Moo	Eumseong-gun, KR	4	20
# of filed Patents : 4 Total Citations : 20

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• 0 Citation Count
• H01L Class

• 0 % this patent is cited more than
• 15 Age

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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
August 10, 2010	US,7772626,B2   US7772626B2	GRANTED PATENT AS SECOND PUBLICATION
May 21, 2009	US,20090127600,A1   US20090127600A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 6926083

Cement heating tool for oil and gas well completion

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Abstract

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Apparatus and method for setting cement in the annulus of an oil or gas well during well completion or other similar well operations. An induction heating tool is lowered to a desired position within the well casing and power is supplied to the tool to heat the casing and the cement which has been injected in the annulus adjacent the heated well casing and the wellbore.

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Description

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Claims

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Legal Events

 

• MAFP2024
• MAFP2020
• I2017
• STCF2017
• P2016
• F2015
• AS2015
• PD2014

Date	Code	Event	Description
Sep 13, 2024	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8
May 05, 2020	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4
May 02, 2017	I	Issuance
Apr 12, 2017	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Sep 29, 2016	P	Published
Mar 23, 2015	F	Filing
Mar 23, 2015	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHIH, PO-YUAN;CHEN, PO-YU;REEL/FRAME:039963/0026 Owner name: SINTAI OPTICAL (SHENZHEN) CO., LTD., CHINA Effective Date: Mar 23, 2015 free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHIH, PO-YUAN;CHEN, PO-YU;REEL/FRAME:039963/0026 Owner name: ASIA OPTICAL CO., INC., TAIWAN Effective Date: Mar 23, 2015
Mar 24, 2014	PD	Priority Date