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

Patent Owner(s)

Patent Owner	Address
DIDIER-WERKE AG	65189 WIESBADEN

International Classification(s)

• C04B:LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREO....

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• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Eschner, Axel	Wiesbaden, DE	12	154
Weichert, Thomas	Hohenstein, DE	3	20
Wieland, Klaus	Wiesbaden, DE	4	30
Wohrmeyer, Christoph	Wiesbaden, DE	4	21

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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: 5420087

Refractory or fireproof brick as tin bath bottom brick

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