Granted Patent
Utility
US 4,308,494 · App. 06/050,282
Thyristor power controller for an electrostatic precipitator
Inventors:
Peter C. Gelfand, Clifford Mason, Jerry F. Shoup
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Jun 20, 1979
Inventors
Peter C. Gelfand
Clifford Mason
Jerry F. Shoup
Assignee (at issue)
General Electric Company
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.