Granted Patent
Utility
US 5,147,180 · App. 07/672,971
Optimized blade root profile for steam turbine blades
Inventor:
Mike Johnson
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Mar 21, 1991
Inventor
Mike Johnson
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.