Granted Patent
Utility
US 4,567,309 · App. 06/614,935
Separation of 1,3-butadiene
Inventor:
Santi Kulprathipanja
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: May 29, 1984
Inventor
Santi Kulprathipanja
Assignee (at issue)
UOP LLC
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.