US PATENT SUBCLASS 52 / 784.12
.~.~.~.~ In-turned opposed flanges form edge of door panel

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

782.1  DF  COMPOSITE PREFABRICATED PANEL INCLUDING ADJUNCTIVE MEANS {7}
783.1  DF  .~ Sandwich or hollow with sheet-like facing members {13}
784.1  DF  .~.~ For door or door shutter {5}
784.11  DF  .~.~.~ Fire resistant {1}
784.12.~.~.~.~ In-turned opposed flanges form edge of door panel

DEFINITION

Classification: 52/784.12

In-turned opposed flanges form edge of door panel:

(under subclass 784.11) Structure wherein each of the facing sheets has an integral edge flange, the free end of which is directed toward the opposite sheet, the flanges of the sheets being opposed to one another (e.g., opposed pan-like members).