Granted Patent
Utility
US 5,236,558 · App. 07/588,635
Method to recycle spent ethylene glycol
Inventors:
Edward J. Buyalos, David Pendlebury, Lon K. Bouknight, Neil F. Blake, Clarence McKeithan, Jr.
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Sep 26, 1990
Inventors
Edward J. Buyalos
David Pendlebury
Lon K. Bouknight
Neil F. Blake
Clarence McKeithan, Jr.
Assignee (at issue)
AlliedSignal, 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.