Granted Patent
Utility
US 4,452,674 · App. 06/424,707
Electrolytes for electrochemically treated metal plates
Inventors:
Thomas N. Gillich, John E. Walls, Stanley F. Wanat, William J. Rozell
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Sep 27, 1982
Inventors
Thomas N. Gillich
John E. Walls
Stanley F. Wanat
William J. Rozell
Assignee (at issue)
American Hoechst 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.