Granted Patent
Utility
US 5,142,198 · App. 07/454,522
Microwave reactive gas discharge device
Inventor:
Donald K. Smith
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Dec 21, 1989
Inventor
Donald K. Smith
Assignee (at issue)
Applied Science & Technology, Inc.
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.