Granted Patent
Utility
US 4,598,580 · App. 06/719,109
Inflatable seal for an annular cavity
Inventors:
Gerald R. Alkire, Woodrow W. Frank, Jr., Robert William Thompson
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Apr 2, 1985
Inventors
Gerald R. Alkire
Woodrow W. Frank, Jr.
Robert William Thompson
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.