US PATENT SUBCLASS 52 / 413
.~.~ Integral projections on planar face

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

408  DF  DISPARATE SHEET LAMINA BETWEEN EXPOSED SURFACES OF WALL, FLOOR, OR ROOF (E.G., VAPOR BARRIER, WATERPROOFING MEMBRANE) {3}
411  DF  .~ Additional material forming bond {2}
413.~.~ Integral projections on planar face

DEFINITION

Classification: 52/413

(under subclass 411) Structure wherein the sheet form separating member has a generally planar face with integral projections extending from said face.

SEE OR SEARCH THIS CLASS, SUBCLASS:

443+, for an imperforate backer having means therewith for retaining a cast layer or facing on said backer.