US PATENT SUBCLASS 164 / 254
.~ Means applying vacuum or suction directly to molten casting material

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

253  DF  MEANS TO APPLY VACUUM DIRECTLY TO WORK OR TO HOLD OR MANIPULATE SHAPING MEANS {1}
254.~ Means applying vacuum or suction directly to molten casting material {2}
255  DF  .~.~> Through porous mold body
256  DF  .~.~> Enclosed system including a receptacle and mold {2}

DEFINITION

Classification: 164/254

(under subclass 253) Apparatus wherein the vacuum or suction is directly applied to molten casting material.