Granted Patent
Utility
US 4,384,157 · App. 06/364,108
Catalytic condensation process with propane product stream
Inventor:
Richard R. DeGraff
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: Mar 31, 1982
Inventor
Richard R. DeGraff
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.