1
Jean Florent Campion, Jacques Goudeau, Jean Francois Chariot, Christelle Lavallade: Method of manufacturing a silica powder. Alcatel, Sughrue Mion Zinn Macpeak & Seas PLLC, June 6, 2000: US06071487 (8 worldwide citation)

In the method, a suspension of silica particles in water is provided, the suspension is gelled, the resulting gel is dried under microwaves, the dried gel is fractioned into silica granules having a diameter lying in the range 10 .mu.m to 1000 .mu.m, having an apparent density of about 0.5 g/cm.sup. ...


2
Pierryle Jourdier, Christelle Lavallade, Jean Florent Campion, Philippe Oskeritsian, Jean Maxime Saugrain: Process for making silica powder and use of such powder in the manufacture of an optical fiber preform. Alcatel, Sughrue Mion PLLC, May 14, 2002: US06386373 (4 worldwide citation)

A process is described for making silica powder by a sol-gel process whereby an aqueous suspension is made of a silica-based raw material which includes particles containing chlorine, the pH of the suspension is adjusted to a value from 3 to 4.5 if necessary, the suspension is gelled, the gel obtain ...


3
Pierryle Jourdier, Jean Florent Campion, Jean Maxime Saugrain, Christelle Lavallade, Claire Wane Nguila: Method of manufacturing a fluorine-doped silica powder. Alcatel, Sughrue Mion PLLC, July 12, 2005: US06915664 (2 worldwide citation)

The invention relates to a method of doping silica with fluorine. The method described comprises mixing a powder of silica granules with a solid fluorine compound, thermally decomposing the solid fluorine compound under an inert atmosphere, and densifying the granules to obtain dense grains of doped ...


4
Jean Florent Campion, Jean Philippe Francois, Christelle Lavallade, Philippe Oskeritsian, Jean Maxime Saugrain: Method and apparatus for treating silica granules using porous graphite crucible. Alcatel, Sughrue Mion Zinn Macpeak & Seas PLLC, November 20, 2001: US06319550 (2 worldwide citation)

Silica granules made up of mutually agglomerated silica soot particles are treated by placing the granules in a crucible inside a furnace which contains an inert gas mixed with a chlorine-containing compound and in which the temperature lies in the range 1000° C. to 1500° C. According to the inventi ...


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Pierryle Jourdier, Jean Florent Campion, Jean Maxime Saugrain, Christelle Lavallade, Claire Wane Nguila: Method of manufacturing a fluorine-doped silica powder. Alcatel, Sughrue Mion Pllc, December 26, 2002: US20020194878-A1

The invention relates to a method of doping silica with fluorine. The method described comprises mixing a powder of silica granules with a solid fluorine compound, thermally decomposing the solid fluorine compound under an inert atmosphere, and densifying the granules to obtain dense grains of doped ...