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Wilhelm Langenfeld
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Dusseldorf, DE
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last 30 patents
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Patent Grant
Tap spout for metallurgical vessels and method of repairing
Patent number
4,984,769
Issue date
Jan 15, 1991
Didier-Werke AG
Raimund Bruckner
C21 - METALLURGY OF IRON
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Patent Grant
Gas flushing inlet arrangement in a metallurgical vessel and method...
Patent number
4,522,376
Issue date
Jun 11, 1985
Didier-Werke AG
Wilhelm Langenfeld
B22 - CASTING POWDER METALLURGY
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Patent Grant
Method and device for installing and replacing a gas permeable inse...
Patent number
4,331,471
Issue date
May 25, 1982
Didier-Werke AG
Wilhelm Langenfeld
C21 - METALLURGY OF IRON