Granted Patent
Utility
US 4,478,721 · App. 06/518,579
High efficiency continuous separation process
Inventor:
Clarence G. Gerhold
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Jul 29, 1983
Inventor
Clarence G. Gerhold
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.