US PATENT SUBCLASS 266 / 272
.~ By means plugging aperture

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

271  DF  MEANS SEALING OR OPENING APERTURE IN VESSEL {1}
272.~ By means plugging aperture {1}
273  DF  .~.~> By means injecting plugging compound, e.g., mud gun

DEFINITION

Classification: 266/272

(under subclass 271) Device wherein the means is specialized to seal or stop the opening in the vessel wall.