Granted Patent
Utility
US 5,954,855 · App. 08/837,678
Method for electric steelmaking
Inventors:
Gregory M. Gitman, Grigori Galperine, Stanislav I. Zhigach
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Apr 22, 1997
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.