US PATENT SUBCLASS 428 / 305.5
.~.~ With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component

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}
305.5.~.~ With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component

DEFINITION

Classification: 428/305.5

With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component:

(under subclass 304.4) Subject matter wherein the voids of a component contains a gas specified to be other than air, nitrogen or carbon dioxide; or where the void-containing component contains also a material which is susceptible to a ready chemical reaction in use of the product, e.g., to decomposition at an elevated temperature, etc.

(1) Note. The chemically effective material often is incorporated in the product for fire or flameproofing purposes.

(2) Note. Removal of water of hydration from a hydrated compound is considered to be a chemical reaction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

321.1, for a composite product having a decomposable liquid impregnated in a previously void-containing component.

SEE OR SEARCH CLASS

252, Compositions, 2+, and 601 for fire-extinguishing and fire-proofing compositions, per se, respectively.