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. 11, 1991
Filed:
Nov. 03, 1989
Applicant:
Inventors:
John F Krumwiede, Cumberland, MD (US);
Paul W Kopp, Crystal City, MO (US);
Robert B Heithoff, LaVale, MD (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
501 71 ; 501904 ; 501905 ;
Abstract
A neutral gray, low transmittance (less than 20 percent luminous transmittance) soda-lime-silica glass has reduced solar energy transmittance, and in particular exceptionally low ultraviolet transmittance (less than 20 percent total solar ultraviolet transmittance) when provided with the following colorant constituents: