Granted Patent
Utility
US 5,365,064 · App. 07/983,398
Process for filtering electrically charged particles and energy filter
Inventor:
Gerhard Rettinghaus
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Nov 30, 1992
Inventor
Gerhard Rettinghaus
Assignee (at issue)
Balzers Aktiengesellschaft
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.