US PATENT SUBCLASS 65 / 398
.~.~.~ Germanium or boron containing

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}
397  DF  .~.~ Fluorine doping {1}
398.~.~.~ Germanium or boron containing

DEFINITION

Classification: 65/398

Germanium or boron containing:

(under subclass 397) Processes wherein the fluorine doped optical fiber, waveguide, or preform additionally contains germanium or boron.

(1) Note. The germanium or boron material in the core or clad of the optical fiber, waveguide, or preform may be in the form of a compound or composition.