US PATENT SUBCLASS 52 / 649.3
.~.~.~.~ Having perimeter-surrounding element


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}
648.1  DF  .~ Three-dimensional space-defining {9}
649.1  DF  .~.~ Reinforcement for settable material {2}
649.2  DF  .~.~.~ For beam, column, etc. {2}
649.3.~.~.~.~ Having perimeter-surrounding element {1}
649.4  DF  .~.~.~.~.~> Helical {1}


DEFINITION

Classification: 52/649.3

Having perimeter-surrounding element:

(under subclass 649.2) Structure, including distinct members defining terminal edges, or a terminal corner that delimits an area within the enclosed space in two directions, i.e., a complete frame surrounding an area.

SEE OR SEARCH THIS CLASS, SUBCLASS:

581, for an edge-to-edge connected openwork panel.

631, for a corner formed by laminate with bent facing section.

660+, for an openwork planar fabric or lattice which is indefinite as to length or width.

690+, for a construction formed by side-by-side terminal edge shafts connected by cross members which construction is limited in depth only by the terminal shafts (e.g., a truss or ladder-like openwork).

SEE OR SEARCH CLASS 428, Stock Material or Miscellaneous Articles,

578, for a metallic panel having a nonrectangular perimeter.