Granted Patent
Utility
US 4,373,949 · App. 06/295,122
Method for increasing vessel lining life for basic oxygen furnaces
Inventors:
Jerry V. Spruell, Jennings B. Lewis, III
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Aug 21, 1981
Inventors
Jerry V. Spruell
Jennings B. Lewis, III
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.