Richard F. Obenchain

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Metallurgical furnace
- Patent number 4,009,871
- Issue date Mar 1, 1977
- Richard F. Obenchain
- C21 - METALLURGY OF IRON
Information Patent Grant
Metallurgical shaft furnace
- Patent number 4,009,870
- Issue date Mar 1, 1977
- Richard F. Obenchain
- C21 - METALLURGY OF IRON
Information Patent Grant
Process for the direct reduction of metal oxides
- Patent number 3,953,196
- Issue date Apr 27, 1976
- Richard F. Obenchain
- C21 - METALLURGY OF IRON