Granted Patent
Utility
US 5,486,296 · App. 08/396,941
Detoxification for quaternary ammonium compounds with lignosulfonates
Inventors:
Joseph C. Petrille, III, Stephen R. Vasconcellos, Michael W. Werner
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Mar 1, 1995
Inventors
Joseph C. Petrille, III
Stephen R. Vasconcellos
Michael W. Werner
Assignee (at issue)
Betz Laboratories, 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.