Granted Patent
Utility
US 5,120,901 · App. 07/722,320
Olefin purification process
Inventors:
Thomas J. DiLeo, Cynthia W. Hermann, Carroll W. Lanier, Joachim W. Wolfram
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Jun 27, 1991
Inventors
Thomas J. DiLeo
Cynthia W. Hermann
Carroll W. Lanier
Joachim W. Wolfram
Assignee (at issue)
Ethyl 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.