Granted Patent
Utility
US 5,122,202 · App. 07/548,050
Method and compositions for coating non-ferrous metals
Inventors:
Kenneth A. Dykstra, Frank Müller
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Jul 5, 1990
Inventors
Kenneth A. Dykstra
Frank Müller
Assignee (at issue)
Elf Atochem North America, Inc.
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.