Granted Patent
Utility
US 5,575,995 · App. 08/470,132
Ferric subsulfate gel and methods of using same
Inventor:
Richard L. Giovanoni
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Jun 6, 1995
Inventor
Richard L. Giovanoni
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.