Granted Patent
Utility
US 4,958,754 · App. 07/317,568
Dispenser or sprayer with vent system
Inventor:
Stephen R. Dennis
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Mar 1, 1989
Inventor
Stephen R. Dennis
Assignee (at issue)
Continental Sprayers, Inc.
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.