Granted Patent
Utility
US 6,004,180 · App. 08/940,873
Cleaning of electron-emissive elements
Inventors:
N. Johan Knall, John D. Porter, Colin D. Stanners, Christopher J. Spindt, Victoria A. Bascom
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Sep 30, 1997
Inventors
N. Johan Knall
John D. Porter
Colin D. Stanners
Christopher J. Spindt
Victoria A. Bascom
Assignee (at issue)
Candescent Technologies 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.