Granted Patent
Utility
US 6,417,412 · App. 10/005,110
Purification of tertiary butyl alcohol
Inventors:
Andrew P. Kahn, Lawrence J. Karas
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Dec 3, 2001
Inventors
Andrew P. Kahn
Lawrence J. Karas
Assignee (at issue)
Arco Chemical Technology, L.P.
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.