Granted Patent
Utility
US 5,275,487 · App. 07/939,424
Hazardous waste transportation and disposal
Inventor:
Robert M. Rumph
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Sep 4, 1992
Inventor
Robert M. Rumph
Assignee (at issue)
The Maitland Company, LLC
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.