Granted Patent
Utility
US 4,718,643 · App. 06/863,862
Method and apparatus for rapid high temperature ladle preheating
Inventor:
Grigory M. Gitman
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: May 16, 1986
Inventor
Grigory M. Gitman
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.