Granted Patent
Utility
US 5,712,481 · App. 08/685,364
Process and apparatus for analysis of hydrocarbon species by near infrared spectroscopy
Inventors:
William T. Welch, Michael B. Sumner, Brian K. Wilt, Roy Roger Bledsoe, Jr., Steven M. Maggard
Patented Case
View Patent ↗
Granted: Jan 27, 1998
Filed: Jul 23, 1996
Inventors
William T. Welch
Michael B. Sumner
Brian K. Wilt
Roy Roger Bledsoe, Jr.
Steven M. Maggard
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.