Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Reexamination Certificate
2006-04-11
2006-04-11
Vincent, Sean (Department: 1731)
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
C065S017200, C065S440000
Reexamination Certificate
active
07024890
ABSTRACT:
Sol-gel process for the production of optical fiber preforms or overcladdings by preparing a sol, gelling the sol, drying the wet gel to a dry porous gel and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350° C. to 900° C. to remove organic impurities in the dry gel, it is carried out at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar.
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Costa Fulvio
Costa Lorenzo
Crepaldi Matteo
Degussa Novara Technology S.p.A.
Smith , Gambrell & Russell, LLP
Vincent Sean
LandOfFree
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