Granted Patent
Utility
US 6,026,980 · App. 09/310,894
One-piece blow-molded closed plastic drum with handling ring and method of molding same
Inventors:
John H. Malik, John J. Mikula, Robert A. Julien
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: May 12, 1999
Inventors
John H. Malik
John J. Mikula
Robert A. Julien
Assignee (at issue)
Greif Bros. Corp. of Ohio, Inc.
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.