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Herbert Richrath
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Hagen, DE
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last 30 patents
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Patent Grant
Method of thermal treatment of mineral raw material
Patent number
5,458,833
Issue date
Oct 17, 1995
Dolomitwerke GmbH
Thomas Hammer
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
Production of sintered dolomite in a rotary kiln
Patent number
5,246,648
Issue date
Sep 21, 1993
Dolomitwerke GmbH
Thomas Hammer
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
Method for making sintered dolomite with a low porosity and a good...
Patent number
4,394,454
Issue date
Jul 19, 1983
Dolomitwerke GmbH
Karlheinz Rosener
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES