Granted Patent
Utility
US 4,239,505 · App. 06/073,297
Purge gas conditioning of high intensity ionization system for particle removal
Inventor:
Raymond Francis Drnevich
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Sep 7, 1979
Inventor
Raymond Francis Drnevich
Assignee (at issue)
Union Carbide 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.