US PATENT SUBCLASS 218 / 158
.~.~.~ Arc extinguishing material

Current as of: June, 1999
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218 /   HD   HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES

1  DF  ARC PREVENTING OR EXTINGUISHING DEVICES {14}
155  DF  .~ Housing structure {1}
156  DF  .~.~ Arcing chamber {2}
158.~.~.~ Arc extinguishing material

DEFINITION

Classification: 218/158

Arc extinguishing material:

(under subclass 156) Subject matter comprising a material which facilitates current interruption and extinguishment of an arc.