Granted Patent
Utility
US 4,343,459 · App. 06/184,824
Basic oxygen furnace construction
Inventor:
Loren L. Kimmel
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Sep 8, 1980
Inventor
Loren L. Kimmel
Assignee (at issue)
Dresser Industries, Inc.
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.