Granted Patent
Utility
US 4,278,464 · App. 06/107,535
Method for preventing slopping during subsurface pneumatic refining of steel
Inventors:
Roland P. A. G. Bury, Stewart K. Mehlman, Rockne J. Andreini
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Dec 27, 1979
Inventors
Roland P. A. G. Bury
Stewart K. Mehlman
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.