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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	P O BOX 2463 INTELLECTUAL PROPERTY HOUSTON TX 77252-2463

International Classification(s)

• C07C:ACYCLIC OR CARBOCYCLIC COMPOUNDS
• B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....

• 2013 Application Filing Year
• C07C Class
• 3080 Applications Filed
• 2671 Patents Issued To-Date
• 86.73 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Lauritzen, Ann Marie	Houston, US	24	174
# of filed Patents : 24 Total Citations : 174
Madgavkar, Ajay Madhav	Katy, US	33	3019
# of filed Patents : 33 Total Citations : 3019

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• 0 Citation Count
• C07C Class

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

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DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
January 09, 2018	US,9861967,B2   US9861967B2	GRANTED PATENT AS SECOND PUBLICATION
November 12, 2015	US,20150321182,A1   US20150321182A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: RE46899

Displacement sensing method and motor control apparatus

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Abstract

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A displacement sensing method of the present invention includes the steps of superimposing a predetermined signal on a torque command to supply a drive torque to a motor, measuring an amplitude spectrum ratio between the drive torque in superimposing the predetermined signal on the torque command and a motor angle measured by a displacement sensor, generating correction data for evening out the amplitude spectrum ratio, and correcting the measured motor angle so that the motor angle measured by the displacement sensor is equal to an actual motor angle using the correction data.

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Description

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Claims

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Legal Events

 

• MAFP2023
• MAFP2019
• I2018
• F2013
• PD2007

Date	Code	Event	Description
May 23, 2023	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 12
May 23, 2019	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
Jun 19, 2018	I	Issuance
Dec 05, 2013	F	Filing
Sep 14, 2007	PD	Priority Date