US PATENT SUBCLASS 52 / 783.12
.~.~.~ For door or door shutter

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}
783.11  DF  .~.~ Corrugated component {5}
783.12.~.~.~ For door or door shutter {1}
783.13  DF  .~.~.~.~> Fire resistant

DEFINITION

Classification: 52/783.12

For door or door shutter:

(under subclass 783.11) Structure that is intended to be used as a component of a closure for an entrance or egress.

SEE OR SEARCH THIS CLASS, SUBCLASS:

784.1, for a noncorrugated door panel.

SEE OR SEARCH CLASS

49, Movable or Removable Closures, for doors, per se.