Granted Patent
Utility
US 5,813,191 · App. 08/705,481
Spacer frame for an insulating unit having strengthened sidewalls to resist torsional twist
Inventor:
Raymond G. Gallagher
Patented Case
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Granted: Sep 29, 1998
Filed: Aug 29, 1996
Inventor
Raymond G. Gallagher
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.