Granted Patent
Utility
US 4,348,236 · App. 06/185,480
Composition for castable refractory block
Inventors:
James E. Hines, Richard G. LaBar
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Sep 9, 1980
Inventors
James E. Hines
Richard G. LaBar
Assignee (at issue)
Aluminum Company of America
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.