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

Patent Owner(s)

Patent Owner	Address
NORANDA INC	BCE PLACE 181 BAY STREET SUITE 4100 TORONTO ONTARIO M5J 2

International Classification(s)

• C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Claessens, Pierre	St-Eustache, CA	2	11
# of filed Patents : 2 Total Citations : 11
Stafiej, Jack S	Dorval, CA	3	11
# of filed Patents : 3 Total Citations : 11
White, Carl W	Notre-Dame-de-Grace, CA	23	68
# of filed Patents : 23 Total Citations : 68

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Patent Citation Ranking

• 6 Citation Count
• C01B Class

• 6.80 % this patent is cited more than
• 26 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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