Granted Patent
Utility
US 5,939,596 · App. 09/006,076
Butadiene removal system for ethylene plants with front end hydrogenation systems
Inventor:
Mark Whitney
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Jan 12, 1998
Inventor
Mark Whitney
Assignee (at issue)
Stone & Webster Engineering Corp.
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.