Robert S. Sheppard

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Doylestown, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Preparing refractory metal boride powder
- Patent number 4,233,277
- Issue date Nov 11, 1980
- PPG Industries, Inc.
- Robert S. Sheppard
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Preparation of finely-divided refractory powders of groups III-V me...
- Patent number 3,979,500
- Issue date Sep 7, 1976
- PPG Industries, Inc.
- Robert S. Sheppard
- C01 - INORGANIC CHEMISTRY