US PATENT SUBCLASS 65 / 414
.~.~.~ Forming optical fiber or fiber preform by soot buildup (i.e., vapor axial deposition, VAD)

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}
414.~.~.~ Forming optical fiber or fiber preform by soot buildup (i.e., vapor axial deposition, VAD) {2}
415  DF  .~.~.~.~> Forming glass layers with graded or radially varying refractive index
416  DF  .~.~.~.~> Consolidation in situ (e.g., sintering, etc.)

DEFINITION

Classification: 65/414

Forming optical fiber or fiber preform by soot buildup (i.e., vapor axial deposition, VAD):

(under subclass 413) Processes including a step whereby the vaporized material is deposited at a starting point or on a starting material and is tiered or grown in a straight line about which a line or curve is conceived to revolve.

(1) Note. Lacking an indication to the contrary, growth of the fiber or preform by buildup of deposited soot in a vertical direction in respect to an initiating collecting substrate is proper for this subclass.

(2) Note. Processes commonly called "vertical axial deposition" and "horizontal axial deposition" are properly classified here.