Granted Patent
Utility
US 5,221,480 · App. 07/794,287
Method and apparatus to detoxify aqueous based hazardous waste
Inventors:
Alexander Schultheis, Mark A. Landrigan, Arun Lakhani
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Nov 19, 1991
Inventors
Alexander Schultheis
Mark A. Landrigan
Arun Lakhani
Assignee (at issue)
Clean Harbors, 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.