US PATENT SUBCLASS 428 / 921
.~ Fire or flameproofing


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

920  DF  FIRE OR HEAT PROTECTION FEATURE {1}
921.~ Fire or flameproofing


DEFINITION

Classification: 428/921

(under subclass 920) Stock material product in which the product prevents fire or a flame from passing therethrough.

SEE OR SEARCH THIS CLASS, SUBCLASS:

34.1+, for a tube type article of heat insulation not provided for elsewhere.

386, 404+, 432+, 457+, and 539, for other products which include a refractory metal or a compound thereof and which thus possess a fire, heat or flame protection feature.

442, for a laminated stock material product including asbestos which acts to protect against fire or heat.

SEE OR SEARCH CLASS 442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.),

141+, for a textile, cloth, or fabric impregnated with a phosphorus containing material which protects against fire or flame.