Granted Patent
Utility
US 4,717,422 · App. 06/445,790
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: Jan 5, 1988
Filed: Dec 1, 1982
Inventor
Bruno M. Perfetti
Assignee (at issue)
USX 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.