Granted Patent
Utility
US 5,402,835 · App. 08/246,153
Drum funnel
Inventor:
Dennis G. Middleton
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: May 19, 1994
Inventor
Dennis G. Middleton
Assignee (at issue)
New Pig 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.