Granted Patent
Utility
US 5,328,028 · App. 08/108,927
Hazardous waste disposal method and drum assembly
Inventors:
James A. Hale, Jean Sawyer, John A. Plunkett, Lou A. Marinaccio
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Aug 18, 1993
Inventors
James A. Hale
Jean Sawyer
John A. Plunkett
Lou A. Marinaccio
Assignee (at issue)
Greif Bors. 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.