Granted Patent
Utility
US 4,451,288 · App. 06/393,467
Method for producing low hydrogen content in steels produced by subsurface pneumatic refining
Inventor:
Rockne J. Andreini
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Jun 29, 1982
Inventor
Rockne J. Andreini
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.