US PATENT SUBCLASS 65 / 420
.~.~.~.~ Maintaining isotropic conditions inside of tube

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}
417  DF  .~.~.~ Inside of tube or hollow form by soot buildup {3}
420.~.~.~.~ Maintaining isotropic conditions inside of tube

DEFINITION

Classification: 65/420

Maintaining isotropic conditions inside of tube:

(under subclass 417) Processes wherein an environment is sustained that causes the vaporized material to be deposited

evenly on the inner surface of the tube.