Ulrike Wickel

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Krefeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Sinterable SI.sub.3 N.sub.4 powders containing sintering additives...
- Patent number 4,980,322
- Issue date Dec 25, 1990
- Bayer Aktiengesellschaft
- Ulrike Wickel
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Sinterable Si.sub.3 N.sub.4 powder and a process for its preparation
- Patent number 4,845,060
- Issue date Jul 4, 1989
- Bayer Aktiengesellschaft
- Ulrike Wickel
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES