Dieter Menzel

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Duisburg, DT

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Patents Grantslast 30 patents

Information Patent Grant
Producing iron oxide weighting materials for drilling fluids
- Patent number 4,092,407
- Issue date May 30, 1978
- Metallgesellschaft Aktiengesellschaft
- Hans-Joachim Rohrborn
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...