Granted Patent
Utility
US 4,434,540 · App. 06/308,733
Process for repairing or modifying refractory plates of ladle casting cassettes
Inventor:
Romano Cappelli
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Oct 5, 1981
Inventor
Romano Cappelli
Assignee (at issue)
USS Engineers and Consultants, 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.