Granted Patent
Utility
US 6,458,343 · App. 09/566,886
Quaternary compounds, compositions containing them, and uses thereof
Inventors:
William J. Zeman, Craig Poffenberger, Yvonne D. R. Deac
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: May 8, 2000
Inventors
William J. Zeman
Craig Poffenberger
Yvonne D. R. Deac
Assignee (at issue)
Goldschmidt Chemical 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.