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

Patent Owner(s)

Patent Owner	Address
HOWARD INDUSTRIES INC	580 EASTVIEW DRIVE LAUREL MS 39441

International Classification(s)

• H02M:APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEE....

• 1996 Application Filing Year
• H02M Class
• 387 Applications Filed
• 230 Patents Issued To-Date
• 59.44 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Nguyen, Long Thanh	El Paso, TX	4	9
# of filed Patents : 4 Total Citations : 9

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Patent Citation Ranking

• 3 Citation Count
• H02M Class

• 4.73 % this patent is cited more than
• 28 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: 5703438

Line current filter for less than 10% total harmonic distortion

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Abstract

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A line current filter for less than 10% total harmonic distortion includes an isolation transformer having two mutually coupled coils connected to an AC power source and a voltage rectifier. A shunt circuit is connected in parallel to one of the mutually coupled coils. The shunt circuit is comprised of a series connected resistor and capacitor. The shunt circuit may also include a second resistor connected in parallel to the capacitor. A second capacitor is connected across the two mutually coupled coils between the isolation transformer and the DC rectifier.

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Description

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Claims

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Claims data not available

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Legal Events

 

• AS2002
• AS2002
• STCH2002
• FP2002
• LAPS2001
• REMI2001
• I1997
• AS�1997
• F1996
• PD1996
• AS1996

Date	Code	Event	Description
Aug 30, 2002	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SLI LIGHTING PRODUCTS, INC.;REEL/FRAME:013269/0957 Owner name: HOWARD INDUSTRIES, INC., MISSISSIPPI Effective Date: Aug 30, 2002
Aug 28, 2002	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VALMONT INDUSTRIES, INC.;REEL/FRAME:013258/0916 Owner name: SLI LIGHTING PRODUCTS, INC. (FORMERLY KNOWN AS VAL Effective Date: Aug 28, 2002
Feb 06, 2002	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Jan 30, 2002	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Jan 30, 2002
Dec 31, 2001	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Jul 24, 2001	REMI	MAINTENANCE FEE REMINDER MAILED
Dec 30, 1997	I	Issuance
Sep 08, 1997	AS�	SECURITY INTEREST	free format text: SECURITY AGREEMENT;ASSIGNOR:POWER LIGHTING PRODUCTS, INC., A CORP. OF DELAWARE;REEL/FRAME:008829/0159 Owner name: BANKBOSTON, N.A., A NATIONAL BANK, MASSACHUSETTS Effective Date: Sep 08, 1997
Jan 22, 1996	F	Filing
Jan 22, 1996	PD	Priority Date
Jan 12, 1996	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NGUYEN, LONG THANH;REEL/FRAME:007933/0600 Owner name: VALMONT INDUSTRIES, INC., NEBRASKA Effective Date: Jan 12, 1996