Granted Patent
Utility
US 4,356,080 · App. 06/048,133
Solvent deoiling apparatus and process
Inventors:
Edward A. Pullen, Thomas Hallis, Jr.
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Jun 13, 1979
Inventors
Edward A. Pullen
Thomas Hallis, Jr.
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.