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:
Jun. 24, 1997
Filed:
Sep. 15, 1995
Applicant:
Inventor:
Helmut Franz, Pittsburgh, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428426 ; 206451 ; 211 4114 ; 211 491 ; 427154 ; 427164 ; 427165 ;
Abstract
An organic acid anti-staining composition for glass sheets is disclosed herein whereby the corrosive effects of very low pH are eliminated by buffering the organic acid. The buffered organic acid has a less acidic pH, but is as effective as unbuffered organic acid in neutralizing alkali formed by sodium from the glass to prevent staining of the glass surface.