Granted Patent
Utility
US 4,446,987 · App. 06/231,098
Valve attachment for pressurized containers
Inventor:
Kenneth R. White
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Feb 3, 1981
Inventor
Kenneth R. White
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.