Granted Patent
Utility
US 5,378,446 · App. 08/195,783
Corrosion preventive zinc cyanamide and method
Inventor:
John Sinko
Patented Case
View Patent ↗
Granted: Jan 3, 1995
Filed: Feb 14, 1994
Inventor
John Sinko
Assignee (at issue)
WAYNE PIGMENT 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.