John B. Harrell

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Furnace for heating solids
- Patent number 4,191,529
- Issue date Mar 4, 1980
- Salem Furnace Co.
- John B. Harrell
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Weight ratio mixing of volatile containing carbonaceous materials w...
- Patent number 4,189,312
- Issue date Feb 19, 1980
- Salem Furnace Co.
- Ray E. Kranz
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of treating materials on a rotary hearth
- Patent number 3,998,703
- Issue date Dec 21, 1976
- Salem Corporation
- John B. Harrell
- F27 - FURNACES KILNS OVENS RETORTS