Granted Patent
Utility
US 6,439,259 · App. 09/599,021
Air valve closure for containers
Inventor:
Jeffrey L. Beaver
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jun 21, 2000
Inventor
Jeffrey L. Beaver
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.