Granted Patent
Utility
US 5,215,944 · App. 07/737,110
X-ray absorbing glass compositions
Inventor:
James Victor Jones
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Jul 29, 1991
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.