US PATENT SUBCLASS 428 / 308.4
.~.~.~ Void-containing component is synthetic resin or natural rubbers

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

221  DF  WEB OR SHEET CONTAINING STRUCTURALLY DEFINED ELEMENT OR COMPONENT {9}
304.4  DF  .~ Composite having voids in a component (e.g., porous, cellular, etc.) {14}
306.6  DF  .~.~ Void-containing component partially impregnated with adjacent component {3}
308.4.~.~.~ Void-containing component is synthetic resin or natural rubbers

DEFINITION

Classification: 428/308.4

Void-containing component is synthetic resin or natural rubbers:

(under subclass 306.6) Subject matter in which the void-containing component is identified as a synthetic resin composition and claimed as such, e.g., polyvinyl chloride, polyurethane, acrylonitrile-butadiene-styrene, etc.

(1) Note. A synthetic resin is the material described in the definition of Class 520, subclass 1.