Granted Patent
Utility
US 4,517,074 · App. 06/531,924
Hydrocarbon conversion process
Inventor:
John W. Ward
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Sep 13, 1983
Inventor
John W. Ward
Assignee (at issue)
Union Oil Company of California
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.