Granted Patent
Utility
US 4,444,604 · App. 06/472,703
Method of preventing distortion of a heated workpiece during cooling
Inventor:
Wayne A. Martin
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Mar 7, 1983
Inventor
Wayne A. Martin
Assignee (at issue)
United States Steel 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.