US PATENT SUBCLASS 266 / 284
.~ Having specific grain size

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

280  DF  LININGS {6}
284.~ Having specific grain size

DEFINITION

Classification: 266/284

(under subclass 280) Device including the particular size or range of sizes of the particles forming the raw material of the lining.