Granted Patent
Utility
US 5,489,447 · App. 08/263,692
Carrier-bound ketocarboxylic acids as corrosion inhibitors
Inventors:
Andreas Kramer, Adalbert Braig
Patented Case
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Granted: Feb 6, 1996
Filed: Jun 20, 1994
Inventors
Andreas Kramer
Adalbert Braig
Assignee (at issue)
Ciba-Geigy
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.