US PATENT SUBCLASS 65 / 421
.~.~.~ Outside of tube or rod 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}
421.~.~.~ Outside of tube or rod by soot buildup {1}
422  DF  .~.~.~.~> With dehydration (e.g., OH removal, etc.)

DEFINITION

Classification: 65/421

Outside of tube or rod by soot buildup:

(under subclass 413) Processes wherein the vaporized soot material is deposited generally perpendicular to the outermost surface of a rod or tube.

(1) Note. Processes commonly called "outside chemical vapor deposition" are properly classified here and below.