US PATENT SUBCLASS 52 / 656.2
.~.~ Portal frame or closure frame

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

633  DF  OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12}
656.1  DF  .~ Outside corner or peripherally bordered (i.e., framing, etc.) {5}
656.2.~.~ Portal frame or closure frame {4}
656.3  DF  .~.~.~> Fireproof
656.7  DF  .~.~.~> For screen or storm door or window or shutter, etc.
656.4  DF  .~.~.~> For door
656.5  DF  .~.~.~> For window {1}

DEFINITION

Classification: 52/656.2

Portal frame or closure frame:

(under subclass 656.1) Subject matter comprising the framing of an opening for a structure or the framing of the barricading panel, itself, for such an opening.

SEE OR SEARCH CLASS

49, Movable or Removable Closures, for closure panels mounted for movement or removal including support means for such closures having features providing for such movement or removal of a closure panel.