US PATENT SUBCLASS 65 / 419
.~.~.~.~ With step of collapsing tube

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

376  DF  PROCESSES OF MANUFACTURING FIBERS, FILAMENTS, OR PREFORMS {18}
385  DF  .~ Process of manufacturing optical fibers, waveguides, or preforms thereof {29}
413  DF  .~.~ With step of vapor deposition {4}
417  DF  .~.~.~ Inside of tube or hollow form by soot buildup {3}
419.~.~.~.~ With step of collapsing tube

DEFINITION

Classification: 65/419

With step of collapsing tube:

(under subclass 417) Processes including a step of reducing or shrinking the tube.