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Robert S. Sheppard
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Doylestown, OH, US
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last 30 patents
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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
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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