Momentive Performance Materials Gmbh

General Electric Company

Todd R Springer

Charles D Greskovich

Curtis E Scott

Douglas G Seredich

Robert Koch

Ben Matthew Gauthier

David Xu

Michael Peter Winnen

Gloriana Volio

A quartz glass container is shown and described herein. The quartz glass container exhibits a low concentration of surface defects on an inner surface of the container. In aspects hereof, the container may have a surface defect density of 50 or fewer surface defects per square centimeter within a 1 cm band centered 1 cm from the base of the container.

Fused quartz container having low levels of surface defects

A method to form quartz glass ingots of ultra low contamination and defect levels by firing a high-purity quartz form as the feedstock, wherein the quartz glass ingot is free-formed on a platen rotating concentrically with the feedstock quartz article.

Free-formed quartz glass ingots and method for making same

An arc tube for a ceramic metal halide lamp includes a hollow first body member () that is tapered along a majority of its length to aid in removing the molded component from a pin during assembly. An open end () of the first body member has a constant diameter () allowing it to be joined to a constant diameter portion () of the second body member or end cap (). The mating constant diameter portions ensure that the hollow first body member can be monolithically joined with the end cap with a reduced level of seal voids.

Injection molded ceramic metal halide arc tube having non-tapered end and method of forming same

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Twinsburg, OH, United States of America

Todd R Springer