Granted Patent
Utility
US 4,104,321 · App. 05/779,414
Process for the separation of olefins
Inventor:
Dennis J. Ward
Patented Case
View Patent ↗
Granted: Aug 1, 1978
Filed: Mar 18, 1977
Inventor
Dennis J. Ward
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.