US PATENT SUBCLASS 218 / 85
.~.~ Arc extinguishing medium

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}
43  DF  .~ Air-current blowout {18}
85.~.~ Arc extinguishing medium

DEFINITION

Classification: 218/85

Arc extinguishing medium:

(under subclass 43) Subject matter comprising a specific material or substance which enhances or facilitates current interruption and arc extinguishing.