Granted Patent
Utility
US 4,021,910 · App. 05/676,857
Method for treating superalloy castings
Inventors:
William R. Freeman, Louis E. Dardi
Patented Case
View Patent ↗
Granted: May 10, 1977
Filed: Apr 14, 1976
Inventors
William R. Freeman
Louis E. Dardi
Assignee (at issue)
Howmet Turbine Components Corporation
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.