Granted Patent
Utility
US 4,628,582 · App. 06/724,822
Method of making spacer frame for an insulating glass panel
Inventor:
Edmund A. Leopold
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Apr 18, 1985
Inventor
Edmund A. Leopold
Assignee (at issue)
Glass Equipment Development, 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.