Granted Patent
Utility
US 4,313,015 · App. 06/123,227
Separation process
Inventor:
Donald B. Broughton
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Feb 7, 1980
Inventor
Donald B. Broughton
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.