Granted Patent
Utility
US 4,915,581 · App. 07/293,161
Steam turbine with improved inner cylinder
Inventors:
John C. Groenendaal, Jr., Mary W. Schleider
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Jan 3, 1989
Inventors
John C. Groenendaal, Jr.
Mary W. Schleider
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.