Patent ID: 6851280

Claim:
In a process of making halogen lamp bulbs, discharge lamp bulbs, arc discharge lamp bulbs, neon lights, glass electrodes, analytical process glass, reagent container glass, glass test tubes, burets, pipettes, titration cylinders, glass reagent bottles, tubular glass parts in duct work, chemical equipment construction glass, flow meter glass, biotechnological process glass, display component glass, medical glass containers, ampules, bottles, injection bottles, cylinder ampules, or pharmaceutical product primary packaging glass, with a predetermined interior glass surface quality and purity, by hot forming, a method of making glass comprising the steps of: (a) producing a melt of molten glass; (b) passing molten glass along a tool to form a glass body from said melt of molten glass; (c) regulating a stream of gas to provide a sufficient stream of gas having a sufficient oxygen content along said glass body to minimize contamination of said glass body and thus to produce a glass surface of predetermined quality and predetermined purity; (d) continuing said regulating step (c) for a period of time sufficient to set and modify a surface condition of said glass body to a surface depth in the range of approximately 1000 to approximately 2000 nanometers.