US PATENT SUBCLASS 65 / 421
.~.~.~ Outside of tube or rod by soot buildup


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



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.