David A. Lehr

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Medina, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for lengthwise graphitization (LWG) of carbon electrode b...
- Patent number 5,631,919
- Issue date May 20, 1997
- Ucar Carbon Technology Corporation
- Allan W. Intermill
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Modular spray cooled side-wall for electric arc furnaces
- Patent number 5,561,685
- Issue date Oct 1, 1996
- Ucar Carbon Technology Corporation
- David A. Lehr
- F27 - FURNACES KILNS OVENS RETORTS
Information Patent Grant
Spray cooled hood system for handling hot gases from a metallurgica...
- Patent number 5,330,161
- Issue date Jul 19, 1994
- Ucar Carbon Technology Corporation
- David A. Lehr
- C21 - METALLURGY OF IRON