Granted Patent
Utility
US 5,133,640 · App. 07/542,492
Thermal shield for steam turbines
Inventors:
John C. Groenendaal, Jr., David M. Parker
Patented Case
View Patent ↗
Granted: Jul 28, 1992
Filed: Jun 21, 1990
Inventors
John C. Groenendaal, Jr.
David M. Parker
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.