Granted Patent
Utility
US 6,413,893 · App. 09/389,840
Green privacy glass
Inventors:
Larry J. Shelestak, Robert B. Heithoff, Andrew Calabrese, John F. Krumwiede, Anthony V. Longobardo
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Sep 3, 1999
Inventors
Larry J. Shelestak
Robert B. Heithoff
Andrew Calabrese
John F. Krumwiede
Anthony V. Longobardo
Assignee (at issue)
PPG Industries Ohio, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.