Granted Patent
Utility
US 5,596,196 · App. 08/449,326
Oxygenate analysis and control by Raman spectroscopy
Inventors:
John B. Cooper, Kent L. Wise, William T. Welch, Michael B. Sumner
Patented Case
View Patent ↗
Granted: Jan 21, 1997
Filed: May 24, 1995
Inventors
John B. Cooper
Kent L. Wise
William T. Welch
Michael B. Sumner
Assignee (at issue)
Ashland, Inc.
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.