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

Patent Owner(s)

Patent Owner	Address
CABOT MICROELECTRONICS CORPORATION	870 NORTH COMMONS DRIVE AURORA IL 60504

International Classification(s)

• B28D:WORKING STONE OR STONE-LIKE MATERIALS

• 2009 Application Filing Year
• B28D Class
• 52 Applications Filed
• 36 Patents Issued To-Date
• 69.24 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Grumbine, Steven	Aurora, US	42	315
# of filed Patents : 42 Total Citations : 315
Nagarajan, Ramasubramanyam	Naperville, US	7	71
# of filed Patents : 7 Total Citations : 71

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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	Jul 28, 2025

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
January 28, 2014	US,8636560,B2   US8636560B2	GRANTED PATENT AS SECOND PUBLICATION
October 06, 2011	US,20110240001,A1   US20110240001A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9115478

Helical screw pile

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Abstract

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A helical screw pile includes a longitudinal shaft having a top end and a bottom end with a plurality of helical plates arranged on the shaft in increasing diameter from the top to the bottom. The largest diameter helical plate is located toward the bottom of the shaft. A second helical plate having a diameter smaller than that of the first plate is located above the first helical plate. A smaller third helical plate is located above the second helical plate so that the smallest is located toward the top of the shaft. The helical plates can be spaced apart along the shaft or coupled together in an end-to-end manner to form a continuous helix.

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Description

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Claims

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Claims data not available

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Legal Events

 

• STCH2023
• LAPS2023
• FP2023
• FEPP2023
• MAFP2019
• I2015
• P2015
• STCF2015
• F2015
• AS2015
• PD2014

Date	Code	Event	Description
Sep 25, 2023	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Sep 25, 2023	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES	free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Aug 18, 2023	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Aug 18, 2023
Apr 10, 2023	FEPP	FEE PAYMENT PROCEDURE	free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Jan 31, 2019	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2551); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY year of fee payment: 4
Aug 18, 2015	I	Issuance
Aug 06, 2015	P	Published
Jul 29, 2015	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Feb 02, 2015	F	Filing
Jan 30, 2015	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHIN, HYUN TAEK;REEL/FRAME:034869/0230 Owner name: SAMJIN STEEL IND. CO., LTD., KOREA, REPUBLIC OF Effective Date: Jan 30, 2015
Feb 04, 2014	PD	Priority Date