Method of making glass sheets with gas pretreatment of refractory

US10435323B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Matthew John Dejneka · Corning, US
• Benjamin Zain Hanson · Big Flats, US
• Thomas Dale Ketcham · Big Flats, US
• James Robert Rustad · Germantown, US
• Susan Lee Schiefelbein · Ithaca, US
• Kochuparambil Deenamma Vargheese · Horseheads, US

Key dates

• Filing date: Jan 12, 2015
• Grant date: Oct 8, 2019
• Expiry date: Jul 17, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/85
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of making a glass sheet includes exposing a refractory block material comprising at least one multivalent component to a reducing atmosphere for a time and at a temperature sufficient to substantially reduce the at least one multivalent component of the refractory block material. The method also includes flowing molten glass over the refractory block material that has been exposed to the reducing atmosphere while preventing substantial re-oxidation of the at least one multivalent component.