Granted Patent
Utility
US 5,616,231 · App. 08/646,460
Electrobrightening process for aluminum alloys
Inventors:
Albert L. Askin, Paul B. Schultz, Daniel L. Serafin
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: May 8, 1996
Inventors
Albert L. Askin
Paul B. Schultz
Daniel L. Serafin
Assignee (at issue)
Aluminum Company of America
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.