Granted Patent
Utility
US 4,591,063 · App. 06/642,171
Flask closure system
Inventor:
Reinold Geiger
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Aug 20, 1984
Inventor
Reinold Geiger
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.