US PATENT SUBCLASS 264 / 604
.~ Applying hot isostatic fluid pressure to preform using surrounding liquid (e.g., molten glass, melted tin, etc.) or fluid pressure-transmitting deformable sheath (e.g., metal foil, 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}
604.~ Applying hot isostatic fluid pressure to preform using surrounding liquid (e.g., molten glass, melted tin, etc.) or fluid pressure-transmitting deformable sheath (e.g., metal foil, etc.)

DEFINITION

Classification: 264/604

Applying hot isostatic fluid pressure to preform using surrounding liquid (e.g., molten glass, melted tin, etc.) or fluid pressure-transmitting deformable sheath (e.g., metal foil, etc.):

(under subclass 603) Process wherein the shaped article or preform is subjected to (a) hot isostatic pressing by uniformly applying fluid pressure thereto through a encompassing liquid (e.g., molten glass, melted tin, etc.), or (b) hot isostatic fluid pressing through an encompassing

transitory plastic or deformable sheath which transmits the compressing force isostatically to consolidate the preform without the direct contact of the fluid.

(1) Note. Since particulate material is not an article or preform, consolidating of loose particulate by fluid pressure while encased in a transitory plastic or deformable sheath will be considered a molding step classifiable elsewhere in this class, such as in subclasses 500+.