Granted Patent
Utility
US 4,532,159 · App. 06/242,522
Flash-rust protecting of ferrous substrate
Inventors:
David L. Caldwell, David E. Miller, John Christopher Padget
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Mar 11, 1981
Inventors
David L. Caldwell
David E. Miller
John Christopher Padget
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.