US PATENT SUBCLASS 264 / 253
.~.~.~.~ Building unit having spaced walls

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

239  DF  MECHANICAL SHAPING OR MOLDING TO FORM OR REFORM SHAPED ARTICLE {10}
241  DF  .~ To produce composite, plural part or multilayered article {9}
250  DF  .~.~ By separately molding different article portions {3}
251  DF  .~.~.~ Spaced molded portions interconnected by solid preform {2}
253.~.~.~.~ Building unit having spaced walls

DEFINITION

Classification: 264/253

(under subclass 251) Processes in which the product is a building element or module of the type having two spaced walls interconnected by a preform element.