Granted Patent
Utility
US 6,591,894 · App. 09/882,904
Shot blocks for use in die casting
Inventors:
Amitava Guha, William D. Nielsen
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Jun 15, 2001
Inventors
Amitava Guha
William D. Nielsen
Assignee (at issue)
BRUSH WELLMAN, 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.