Granted Patent
Utility
US 4,815,096 · App. 07/165,609
Cooling system and method for molten material handling vessels
Inventor:
William H. Burwell
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Mar 8, 1988
Inventor
William H. Burwell
Assignee (at issue)
Union Carbide 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.