Granted Patent
Utility
US 4,533,573 · App. 06/569,822
Anti-scaling or marking composition for application to metal products and method of making and using the composition
Inventor:
Bruno M. Perfetti
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Jan 11, 1984
Inventor
Bruno M. Perfetti
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.