Granted Patent
Utility
US 4,756,437 · App. 07/019,104
Closure cap with vapor impermeable lamina
Inventor:
Massimo Rossi-Mossuti
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Feb 26, 1987
Inventor
Massimo Rossi-Mossuti
Assignee (at issue)
W. R. Grace & Co.
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.