Granted Patent
Utility
US 5,348,645 · App. 07/942,117
Determination of aromatics in hydrocarbons by near infrared spectroscopy
Inventors:
Steven M. Maggard, William T. Welch
Patented Case
View Patent ↗
Granted: Sep 20, 1994
Filed: Sep 8, 1992
Inventors
Steven M. Maggard
William T. Welch
Assignee (at issue)
Ashland Oil, 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.