Granted Patent
Utility
US 6,648,993 · App. 09/797,465
Castings from alloys having large liquidius/solidus temperature differentials
Inventor:
Don H. Hashiguchi
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Mar 1, 2001
Inventor
Don H. Hashiguchi
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.