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

Patent Owner(s)

Patent Owner	Address
MANNESMANN DEMAG AG	WOLFGANG-REUTER-PLATZ DUISBURG D-4100

International Classification(s)

• C21C:PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bauer, Hannsgeorg	Witten, DE	4	14
Heinrich, Erich	Witten, DE	1	5
Meyer, Helmut	Witten, DE	95	606
Otto, Josef	Wetter, DE	10	84
Ploetz, Klaus V	Kaarst, DE	1	5
Schneider, Ralf	Mettmann, DE	58	274
Walter, Manfred	Witten, DE	74	637
Zangs, Ludger	Essen, DE	3	44

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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: 4401296

Electro-metal smelting furnace with taphole arranged at the bottom

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