Granted Patent
Utility
US 5,078,593 · App. 07/547,784
Method for recovery of energy values of oily refinery sludges
Inventors:
Robert J. Schreiber, Fred A. Lafser, Jr., Carolyn Yonely
Patented Case
View Patent ↗
Granted: Jan 7, 1992
Filed: Jul 3, 1990
Inventors
Robert J. Schreiber
Fred A. Lafser, Jr.
Carolyn Yonely
Assignee (at issue)
Industrial Waste Management, 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.