Granted Patent
Utility
US 6,521,391 · App. 09/662,400
Printing plate
Inventors:
David S. Bennett, Sallie L. Blake, Daniel L. Serafin, Jean Ann Skiles, Robert E. Bombalski, Clinton Zediak, Gary A. Nitowski, Joseph D. Guthrie
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Sep 14, 2000
Inventors
David S. Bennett
Sallie L. Blake
Daniel L. Serafin
Jean Ann Skiles
Robert E. Bombalski
Clinton Zediak
Gary A. Nitowski
Joseph D. Guthrie
Assignee (at issue)
ALCOA 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.