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

Patent Owner(s)

Patent Owner	Address
MINNESOTA MINING AND MANUFACTURING COMPANY	P O BOX 33427 ST PAUL MN 55133

International Classification(s)

• C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
• B02B:PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRU....
• C08F:MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONL....
• G02F:DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF ....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Francis, Cecil V	Woodbury, MN	19	142
# of filed Patents : 19 Total Citations : 142
Harelstad, Roberta E	Bloomington, MN	12	131
# of filed Patents : 12 Total Citations : 131
White, Kenneth M	Oakdale, MN	22	234
# of filed Patents : 22 Total Citations : 234

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Patent Citation Ranking

• 16 Citation Count
• C09K Class

• 58.54 % this patent is cited more than
• 32 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

Full Text

US Patent No: 9163621

Apparatus for controlling compressor and refrigerator having the same

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Abstract

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A compressor control apparatus, and a refrigerator including the same are provided. Operation of two compressors may be controlled using one inverter, thereby reducing a number of components, increasing compressor capacity, and enhancing operation efficiency of the system. Commonly used switching elements may be switched at an operating frequency, allowing the simultaneous operation of two compressors, reducing switching losses, and improving the efficiency and stability of the system.

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Description

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Claims

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Legal Events

 

• MAFP2021
• I2018
• STCF2018
• P2015
• AS2015
• F2014
• PD2013

Date	Code	Event	Description
Oct 21, 2021	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 15, 2018	I	Issuance
Apr 25, 2018	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Apr 23, 2015	P	Published
Feb 27, 2015	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BERTOLDO, PIETRO;REEL/FRAME:035260/0213 Owner name: ITT ITALIA S.R.L., ITALY Effective Date: Feb 27, 2015
Oct 21, 2014	F	Filing
Oct 21, 2013	PD	Priority Date