US PATENT SUBCLASS 264 / 434
.~.~ Including vitrifying or sintering (e.g., fusing, firing, burning, etc.)

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

405  DF  DIRECT APPLICATION OF ELECTRICAL OR WAVE ENERGY TO WORK (E.G., ELECTROMAGNETIC WAVE, PARTICULATE, MAGNETIC, INDUCTION HEAT, SONIC, ELECTROSTATIC ENERGY, ETC.) {26}
430  DF  .~ Producing or treating inorganic material, not as pigments, conductive enhancers, or fillers (e.g., ceramic, refractory material, etc.) {4}
434.~.~ Including vitrifying or sintering (e.g., fusing, firing, burning, etc.)

DEFINITION

Classification: 264/434

Including vitrifying or sintering (e.g., fusing, firing, burning, etc.):

(under subclass 430) Processes wherein the inorganic material thereof is subjected to temperatures sufficiently high (with or without pressure) which causes said material to, at least partially, coalesce or fuse.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125+, for processes of sintering or heat fusion of particles to autogenously bond, without the use of electrical, particulate or wave energy.

239+, especially subclass 332, for processes of sintering or heat fusion of particles wherein the particulate material is completely melted, without the use of electrical, particulate or wave energy.

603+, for processes of sintering a shaped inorganic preform external of a mold and without the use of electrical, particulate or wave energy.