Granted Patent
Utility
US 6,768,021 · App. 09/470,360
Process improvement for continuous ethyl acetate production
Inventors:
Kimberly Ann Horan, Carl D. Murphy, Russell Mark Stephens, R. Jay Warner, Kenneth A. Windhorst
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Dec 22, 1999
Inventors
Kimberly Ann Horan
Carl D. Murphy
Russell Mark Stephens
R. Jay Warner
Kenneth A. Windhorst
Assignee (at issue)
Celanese International 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.