Granted Patent
Utility
US 6,254,104 · App. 09/300,541
Gasket for an aerosol valve stem
Inventor:
Hans W. Hafner
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Apr 27, 1999
Inventor
Hans W. Hafner
Assignee (at issue)
Precision Valve Corporation
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.