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

Patent Owner(s)

Patent Owner	Address
FETERL ACQUISITION CORP	P O BOX 398 411 CENTER AVENUE SALEM SD 57058

International Classification(s)

• B04B:CENTRIFUGES

• 1983 Application Filing Year
• B04B Class
• 46 Applications Filed
• 0 Patents Issued To-Date
• 0 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Feterl, Leon G	Salem, SD	7	74
# of filed Patents : 7 Total Citations : 74

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Patent Citation Ranking

• 4 Citation Count
• B04B Class

• 0 % this patent is cited more than
• 41 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: 4457746

Apparatus for centrifugal separation

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Abstract

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A centrifugal separator for grain and like particulate material utilizing a rotatably driven separator bowl having an outwardly inclined peripheral wall, in combination with a vibrator. Vibration and centrifugal force acting on material deposited in the rotating bowl cause it to move outwardly towards the bowl periphery and up the aforesaid inclined wall for selective discharge of relatively heavy and light particles at vertically spaced exit zones formed by a guide baffle assembly adjacent the upper periphery of the inclined wall.

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Description

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Claims

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Legal Events

 

• STCH2018
• AS2004
• AS2002
• AS2002
• AS2001
• FP1996
• LAPS1996
• REMI1996
• FPAY1991
• FPAY1987
• I1984
• F1983
• PD1983
• AS1982

Date	Code	Event	Description
Jan 23, 2018	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Jan 30, 2004	AS	ASSIGNMENT	free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:WELLS FARGO BUSINESS CREDIT INC.;REEL/FRAME:015841/0905 Owner name: FETERL MANUFACTURING CORP., SOUTH DAKOTA Effective Date: Jan 30, 2004
Jun 27, 2002	AS	ASSIGNMENT	free format text: SECURITY INTEREST;ASSIGNOR:FETERL MANUFACTURING CORP.;REEL/FRAME:013352/0896 Owner name: HOME FEDERAL BANK, SOUTH DAKOTA Effective Date: Jun 27, 2002
Jun 21, 2002	AS	ASSIGNMENT	free format text: SECURITY INTEREST;ASSIGNOR:FETERL MANUFACTURING CORP.;REEL/FRAME:013362/0365 Owner name: WELLS FARGO BUSINESS CREDIT, INC., MINNESOTA Effective Date: Jun 21, 2002
Dec 31, 2001	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CORE INDUSTRIES, INC.;REEL/FRAME:012735/0315 Owner name: FETERL MFG. CO., SOUTH DAKOTA Effective Date: Dec 31, 2001 free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FETERL MFG. CO.;REEL/FRAME:012735/0321 Owner name: FETERL ACQUISITION CORP., SOUTH DAKOTA Effective Date: Dec 31, 2001
Jul 03, 1996	FP	EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Jul 03, 1996
Jun 30, 1996	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Feb 06, 1996	REMI	MAINTENANCE FEE REMINDER MAILED
Dec 30, 1991	FPAY	FEE PAYMENT	year of fee payment: 8
Dec 28, 1987	FPAY	FEE PAYMENT	year of fee payment: 4
Jul 03, 1984	I	Issuance
Jan 07, 1983	F	Filing
Jan 07, 1983	PD	Priority Date
Nov 30, 1982	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FETERL, LEON G.;REEL/FRAME:004085/0683 Owner name: CORE INDUSTRIES, INC., 500 N. WOODWARD AVE., BLOOM Effective Date: Nov 30, 1982