Glass manufacturing – Processes – Operating under inert or reducing conditions
Reexamination Certificate
2008-04-29
2008-04-29
Lopez, Carlos (Department: 1791)
Glass manufacturing
Processes
Operating under inert or reducing conditions
C065S086000, C065S404000
Reexamination Certificate
active
10957922
ABSTRACT:
A silica deposition tube is fused in a deuterium (D2) gas atmosphere and optionally baked in a deuterium (D2) gas atmosphere to substantially reduce the hydrogen content in the tube for decreased fiber attenuation. Alternatively, raw silica material is pre-treated in D2gas followed by fusing of the raw silica tube in a D2gas environment.
REFERENCES:
patent: 4515612 (1985-05-01), Burrus et al.
patent: 6799440 (2004-10-01), Zeng et al.
Ahlgren Frederic F.
Duggal Anil Raj
Lou Victor L.
Zeng Larry Q.
Lopez Carlos
Momentive Performance Materials Inc.
Vicari Dominick G.
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