Granted Patent
Utility
US 4,142,887 · App. 05/879,610
Steel ladle desulfurization compositions and methods of steel desulfurization
Inventor:
Leon A. Luyckx
Patented Case
View Patent ↗
Granted: Mar 6, 1979
Filed: Feb 21, 1978
Inventor
Leon A. Luyckx
Assignee (at issue)
Reactive Metals & Alloys 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.