Granted Patent
Utility
US 4,556,536 · App. 06/164,486
Method and composition for corrosion inhibition of carbon steel by ammonium sulfate
Inventor:
Joseph Novotny
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Jun 30, 1980
Inventor
Joseph Novotny
Assignee (at issue)
ALLIED CONSULTING, 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.