Granted Patent
Utility
US 4,572,731 · App. 06/685,427
Pinch means for attenuating float glass and method of using same
Inventor:
O.W. Williams
Patented Case
View Patent ↗
Granted: Feb 25, 1986
Filed: Dec 24, 1984
Inventor
O.W. Williams
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.