Granted Patent
Utility
US 4,401,480 · App. 06/312,574
Method of selective grain growth in nickel-base superalloys by controlled boron diffusion
Inventor:
Edwin Alfred Crombie, III
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Oct 19, 1981
Inventor
Edwin Alfred Crombie, III
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.