Granted Patent
Utility
US 4,921,116 · App. 07/243,854
Steel drum
Inventors:
Thomas D. Troughton, Robert D. Irwin
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Sep 13, 1988
Inventors
Thomas D. Troughton
Robert D. Irwin
Assignee (at issue)
Pacific Rim Packaging 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.