Granted Patent
Utility
US 5,036,993 · App. 07/619,056
Self-sealing closure
Inventor:
Douglas P. Ramsey
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Nov 28, 1990
Inventor
Douglas P. Ramsey
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.