US PATENT SUBCLASS 266 / 45
.~ Plugging or tapping

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

44  DF  PROCESS {3}
45.~ Plugging or tapping

DEFINITION

Classification: 266/45

(under subclass 44) Method for closing or opening apertures in the walls of metallurgical apparatus.

(1) Note. An example of the type of process to be found herein is a method of operating a mud gun to seal or plug a blast furnace tap hole.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271+, for apparatus for plugging or tapping apertures in metallurgical furnaces.