Granted Patent
Utility
US 4,709,747 · App. 06/899,492
Process and apparatus for reducing macrosegregation adjacent to a longitudinal centerline of a solidified body
Inventors:
Ho Yu, Douglas A. Granger
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: Aug 22, 1986
Inventors
Ho Yu
Douglas A. Granger
Assignee (at issue)
Aluminum Company of America
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.