Granted Patent
Utility
US 4,437,082 · App. 06/397,288
Apparatus for continually upgrading transformer dielectric liquid
Inventors:
Edward J. Walsh, Robert A. Kurz
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Jul 12, 1982
Inventors
Edward J. Walsh
Robert A. Kurz
Assignee (at issue)
Westinghouse Electric Company LLC
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.