US PATENT SUBCLASS 264 / 653
.~ Including plural heating steps

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

603  DF  OUTSIDE OF MOLD SINTERING OR VITRIFYING OF SHAPED INORGANIC ARTICLE OR PREFORM {30}
653.~ Including plural heating steps {3}
654  DF  .~.~> Including diverse heating of article prior to outside-mold sintering or vitrifying {5}
662  DF  .~.~> Including diverse heating of article subsequent to sintering {2}
666  DF  .~.~> Plural sintering steps having specified temperature (e.g., presintering, etc.)

DEFINITION

Classification: 264/653

Including plural heating steps:

(under subclass 603) Process wherein there are multiple steps or stages of heating.

(1) Note. Included in this subclass are processes in which (a) the temperature is varied over a given time span, (b) the preform is subjected to two or more distinct heating steps, (c) the product is cooled under controlled conditions, or (d) a portion of the product is heated or cooled at a different rate than other portions.