Granted Patent
Utility
US 5,788,921 · App. 08/739,718
Apparatus for electric steelmaking
Inventors:
Gregory M. Gitman, Grigori Galperine, Stanislav I. Zhigach
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Oct 29, 1996
Inventors
Gregory M. Gitman
Grigori Galperine
Stanislav I. Zhigach
Assignee (at issue)
American Combustion, 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.