Helmut S. Erhard

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Wiesloch, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the recycling of residues for the production of portlan...
- Patent number 6,146,133
- Issue date Nov 14, 2000
- Heidelberger Zement AG
- Helmut S. Erhard
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for dry desulfurizing flue gases
- Patent number 5,667,582
- Issue date Sep 16, 1997
- Heidelberger Zement Aktiengesellschaft
- Jochen Ziegler
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES