Granted Patent
Utility
US 5,998,331 · App. 08/812,844
Organoamine siloxane alkoxylate surfactants
Inventor:
George A. Policello
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Mar 6, 1997
Inventor
George A. Policello
Assignee (at issue)
Witco Corporation
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.