US PATENT SUBCLASS 220 / 304
.~.~ With packing or gasket

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
288  DF  .~ Removable closure guided in rotary movement (e.g., screw) {6}
304.~.~ With packing or gasket

DEFINITION

Classification: 220/304

(under subclass 288) Device including means acting at the juncture of the closure and an adjacent member to oppose the passage of fluid therebetween.