Granted Patent
Utility
US 5,615,835 · App. 08/456,511
Trigger sprayer having disc valve
Inventor:
Philip L. Nelson
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: Jun 1, 1995
Inventor
Philip L. Nelson
Assignee (at issue)
Contico International, LLC
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.