US PATENT SUBCLASS 264 / 539
.~.~.~ Including extrusion

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

500  DF  DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK {14}
523  DF  .~ Including application of internal fluid pressure to hollow finite length parison to expand same into conformity with female mold part {10}
537  DF  .~.~ Including injection forming of parison or portion thereof {2}
539.~.~.~ Including extrusion

DEFINITION

Classification: 264/539

Including extrusion:

(under subclass 537) Processes in which material is shaped to the cross section of an orifice by forcing it through the confining orifice.