Granted Patent
Utility
US 5,601,677 · App. 08/449,595
Method of making a glazing unit having three or more glass sheets and having a low thermal edge
Inventor:
Edmund A. Leopold
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: May 24, 1995
Inventor
Edmund A. Leopold
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.