Granted Patent
Utility
US 4,904,442 · App. 07/270,878
Permanent cavity seal ring for a nuclear reactor containment arrangement
Inventors:
Kenneth J. Swidwa, Robert B. Salton, James R. Marshall
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Nov 14, 1988
Inventors
Kenneth J. Swidwa
Robert B. Salton
James R. Marshall
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.