US PATENT SUBCLASS 264 / 632
.~ Producing hollow article (e.g., tube, etc.)

Current as of: June, 1999
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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}
632.~ Producing hollow article (e.g., tube, etc.) {4}
633  DF  .~.~> Producing bowl-like article
634  DF  .~.~> Shaping by extrusion (e.g., spinning, etc.)
635  DF  .~.~> Utilizing core mandrel
636  DF  .~.~> Casting suspension of particles against forming surface {1}

DEFINITION

Classification: 264/632

Producing hollow article (e.g., tube, etc.):

(under subclass 603) Process wherein the article produced has an empty indention or inward curve (e.g., tube, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

610, for simultaneously burning, vaporizing, or melting of embedded element or core to form nonrandom void.