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

Patent Owner(s)

Patent Owner	Address
FRAMATOME ANP INC	P O BOX 10935 3315 OLD FOREST ROAD LYNCHBURG VA 24506

International Classification(s)

• G21C:NUCLEAR REACTORS

• 1994 Application Filing Year
• G21C Class
• 213 Applications Filed
• 78 Patents Issued To-Date
• 36.62 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Christiansen, David W	Kennewick, WA	19	121
# of filed Patents : 19 Total Citations : 121
Long, John W	Richland, WA	19	256
# of filed Patents : 19 Total Citations : 256

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Patent Citation Ranking

• 5 Citation Count
• G21C Class

• 4.51 % this patent is cited more than
• 29 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: 5939042

Tellurium extraction from copper electrorefining slimes

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Abstract

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The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Ag.sub.2 Se or Ag.sub.2 S, which remains insoluble during autoclave leaching.

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Description

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Claims

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Claims data not available

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Legal Events

 

• MAFP2023
• MAFP2019
• AS�2018
• AS2018
• I2015
• STCF2015
• AS2013
• F2013

Date	Code	Event	Description
Apr 20, 2023	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
Apr 23, 2019	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 23, 2018	AS�	SECURITY INTEREST	free format text: SECURITY AGREEMENT;ASSIGNOR:BRP US INC.;REEL/FRAME:047208/0495 Owner name: BANK OF MONTREAL, AS ADMINISTRATIVE AGENT, CANADA Effective Date: May 23, 2018
May 23, 2018	AS	ASSIGNMENT	free format text: SECURITY AGREEMENT;ASSIGNOR:BRP US INC.;REEL/FRAME:046248/0665 Owner name: BANK OF MONTREAL, AS ADMINISTRATIVE AGENT, CANADA Effective Date: May 23, 2018
Nov 10, 2015	I	Issuance
Oct 21, 2015	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Jul 08, 2013	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAVENPORT, MIKE;WIEGELE, DALE;SCOTT, JOHN CHARLES;AND OTHERS;REEL/FRAME:031105/0456 Owner name: BRP US INC., WISCONSIN Effective Date: Jul 08, 2013
May 31, 2013	F	Filing