Granted Patent
Utility
US 5,022,897 · App. 07/440,899
Method for hazardous waste removal and neutralization
Inventors:
Gerald P. Balcar, Paul H. Krumrine, Neal Schwartz, Burton J. Sutker, Gail J. Wood
Patented Case
View Patent ↗
Granted: Jun 11, 1991
Filed: Nov 22, 1989
Inventors
Gerald P. Balcar
Paul H. Krumrine
Neal Schwartz
Burton J. Sutker
Gail J. Wood
Assignees (at issue)
Potters Industries, LLC
Roth Bros. Smelting Corp.
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.