Glass batch liquefaction

USRE32317E · kind E · reissue

Assignee

• PPG Industries, Inc. · US

Inventors

• Gerald E. Kunkle · New Kensington, US
• Joseph M. Matesa · Plum, US

Key dates

• Filing date: May 2, 1985
• Grant date: Dec 30, 1986
• Expiry date: May 2, 2005

Classification

• Technology area (CPC —): General

Abstract

The initial step of melting glass, converting particulate batch materials to a partially melted, liquefied state, is carried out on a support surface of batch. As liquefied batch is drained from the surface, additional batch is fed onto the surface to maintain the surface substantially constant. The questions raised in reexamination request No. 90/000,701, filed Dec. 31, 1984 have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).