US PATENT SUBCLASS 65 / 417
.~.~.~ Inside of tube or hollow form by soot buildup

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.~.~.~ Inside of tube or hollow form by soot buildup {3}
418  DF  .~.~.~.~> Elongated material feed means within tube (e.g., reactant feed means place inside of tube, etc.)
419  DF  .~.~.~.~> With step of collapsing tube
420  DF  .~.~.~.~> Maintaining isotropic conditions inside of tube

DEFINITION

Classification: 65/417

Inside of tube or hollow form by soot buildup:

(under subclass 413) Processes wherein the vaporized soot material is deposited onto an inner surface of an elongated hollow structure or cavity.

(1) Note. Processes commonly called "mod-ified chemical vapor deposition" or "inside chemical vapor deposition" are properly classified here.