Sol-gel process for the production of optical fiber preforms

Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...

Reexamination Certificate

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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.

REFERENCES:
patent: 3535890 (1970-10-01), Hansen et al.
patent: 4072489 (1978-02-01), Loxley et al.
patent: 4220461 (1980-09-01), Samanta
patent: 4419115 (1983-12-01), Johnson et al.
patent: 4707174 (1987-11-01), Johnson, Jr. et al.
patent: 5145510 (1992-09-01), Saito et al.
patent: 5238483 (1993-08-01), Miyashita et al.
patent: 0 257 587 (1988-03-01), None
patent: WO0053536 (2000-09-01), None
patent: 63 074924 (1988-04-01), None
patent: 63 190729 (1988-08-01), None
patent: 02 271928 (1990-11-01), None
patent: 05 147950 (1993-08-01), None
European Search Report, dated Jan. 8, 2002, for European Patent Application No. 01118511.3. 3 pps.
International Search Report, dated May 27, 2003, issued by the European Patent Office, for International Patent Application No. PCT/EP02/04371 (7 pages).

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