Granted Patent
Utility
US 6,414,194 · App. 09/557,237
Process and apparatus for making ultra-pure DMSO
Inventors:
Claude Bloom, Charles G. Ashe, John Ferguson, Joe P. Gibbons, Jr., Kenneth W. Otto, Alan M. Rodger
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Apr 24, 2000
Inventors
Claude Bloom
Charles G. Ashe
John Ferguson
Joe P. Gibbons, Jr.
Kenneth W. Otto
Alan M. Rodger
Assignee (at issue)
Gaylord Chemical Company LLC
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.