US PATENT SUBCLASS 264 / 50
.~ By mechanically introducing gas into material

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

41  DF  PORE FORMING IN SITU (E.G., FOAMING, ETC.) {6}
50.~ By mechanically introducing gas into material

DEFINITION

Classification: 264/50

(under subclass 41) Processes in which a pore forming gas is introduced or forced by mechanical means into a plastic material before the molding and solidification operation.

(1) Note. Operations including shaping and solidification of a froth, per se, with no pore forming steps are classified below on manipulative molding steps and cross-referenced here when pertinent.