Granted Patent
Utility
US 4,493,876 · App. 06/600,383
Corrosion inhibition
Inventors:
Kevin L. Birkett, Edward Scovell, Glyn R. John
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Apr 16, 1984
Inventors
Kevin L. Birkett
Edward Scovell
Glyn R. John
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.