Granted Patent
Utility
US 4,374,724 · App. 06/187,282
Plural stage desalting/dehydrating apparatus
Inventor:
James R. Robinson
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Sep 15, 1980
Inventor
James R. Robinson
Assignee (at issue)
Petrolite Corporation
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.