Granted Patent
Utility
US 4,434,448 · App. 06/399,507
Non-contaminating transformer oil pump, static arrester, and control circuit
Inventors:
Clifford J. Bell, Ramsis S. Girgis
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Jul 19, 1982
Inventors
Clifford J. Bell
Ramsis S. Girgis
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.