US PATENT SUBCLASS 264 / 54
.~.~ Chemical blowing

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}
51  DF  .~ By gas forming or expanding {3}
54.~.~ Chemical blowing {1}
55  DF  .~.~.~> Plural or incremental expansion steps

DEFINITION

Classification: 264/54

(under subclass 51) Processes in which the voids are formed by the generation of gas by a chemical reaction of gas producing reactants or agents incorporated in the molding material.