US PATENT SUBCLASS 65 / 476
.~.~ By modifying fluid pressure (e.g., vacuum, reduced or superatmospheric pressure, etc.)

Current as of: June, 1999
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65 /   HD   GLASS MANUFACTURING

376  DF  PROCESSES OF MANUFACTURING FIBERS, FILAMENTS, OR PREFORMS {18}
475  DF  .~ With fiber drawing or pulling (e.g., attenuating, etc.) {6}
476.~.~ By modifying fluid pressure (e.g., vacuum, reduced or superatmospheric pressure, etc.)

DEFINITION

Classification: 65/476

By modifying fluid pressure (e.g., vacuum, reduced or superatmospheric pressure, etc.):

(under subclass 475) Processes including a step of changing or varying an existing pressure to perfect the drawing operation.