Granted Patent
Utility
US 4,857,261 · App. 07/238,380
Reactor vessel head area monitoring system
Inventors:
James R. Marshall, Mary F. Thorn
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Aug 31, 1988
Inventors
James R. Marshall
Mary F. Thorn
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.