Granted Patent
Utility
US 5,217,138 · App. 07/881,328
Liquid transport drum with removable liner
Inventor:
Dwight E. Nichols
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: May 7, 1992
Inventor
Dwight E. Nichols
Assignee (at issue)
Hoover Limited
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.