Hans Hoffgen

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Hor-Grenzhausen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Flushing block
- Patent number 4,944,497
- Issue date Jul 31, 1990
- Radex-Heraklith Industriebeteilgungs AG
- Bernd Grabner
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Extracting device for a gas-purge brick
- Patent number 4,670,958
- Issue date Jun 9, 1987
- Radex Deutschland Aktiengesellschaft fur feuerfeste Erzeugnisse
- Hans Hoffgen
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Gas bubble brick for metallurgical vessels
- Patent number 4,616,809
- Issue date Oct 14, 1986
- Hans Hoffgen
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Apparatus for introducing gas to molten metal
- Patent number 4,568,066
- Issue date Feb 4, 1986
- Osterreichisch Amerikanische Magnesit Aktiengesellschaft
- Bernd Grabner
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Gas bubble brick for metallurgical vessels
- Patent number 4,560,149
- Issue date Dec 24, 1985
- Hans Hoffgen
- B22 - CASTING POWDER METALLURGY