Granted Patent
Utility
US 5,480,056 · App. 08/121,795
Plunger for drum liner removal
Inventors:
William Lima, Earl V. Lind, Philip D. Bartlett
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Sep 15, 1993
Inventors
William Lima
Earl V. Lind
Philip D. Bartlett
Assignee (at issue)
Russell-Stanley 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.