Granted Patent
Utility
US 5,519,991 · App. 08/298,010
Increased efficiency arcjet thruster
Inventor:
George W. Butler
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Aug 30, 1994
Inventor
George W. Butler
Assignee (at issue)
Olin 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.