Granted Patent
Utility
US 5,704,405 · App. 08/619,087
Process and apparatus for filling insulating glass panes with heavy gas
Inventor:
Peter Lisec
Patented Case
View Patent ↗
Granted: Jan 6, 1998
Filed: Mar 21, 1996
Inventor
Peter Lisec
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.