Granted Patent
Utility
US 4,873,206 · App. 07/215,191
Dark, neutral, gray, nickel-free glass composition
Inventor:
James Victor Jones
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Jul 5, 1988
Inventor
James Victor Jones
Assignee (at issue)
PPG Industries, 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.