The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1993
Filed:
Apr. 01, 1992
Ken Soda, Chicago, IL (US);
Tru Vue, Inc., Chicago, IL (US);
Abstract
A method of etching a glass sheet using a curtain coater includes supporting the sheet at its periphery and in a generally horizontal position such that it may sag under its own weight. Sagging causes the uppermost surface of the glass sheet to assume a generally concave form. Etchant solution applied to the uppermost surface flows over the glass to form a nonuniform layer on the uppermost surface. The layer has a minimum thickness at the periphery of the glass sheet. Etchant solution is applied to the glass using a curtain coater designed to handle a corrosive etchant solution. The sheet of glass is supported on a frame including a seal to prevent etchant solution from contacting a second surface of the glass.