Granted Patent
Utility
US 4,288,219 · App. 06/049,758
Refractory insulated member and method of installation thereof in a reheat furnace
Inventors:
John W. Gana, Dwight L. Torlay
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Jun 18, 1979
Inventors
John W. Gana
Dwight L. Torlay
Assignee (at issue)
United States Steel 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.