Granted Patent
Utility
US 4,987,950 · App. 07/366,759
Method and apparatus for controlling the heat transfer of liquid coolant in continuous casting
Inventor:
Ho Yu
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Jun 14, 1989
Inventor
Ho Yu
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.