Granted Patent
Utility
US 6,648,060 · App. 10/147,288
Reinforced shell mold and method
Inventor:
Xi Yang
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: May 15, 2002
Inventor
Xi Yang
Assignee (at issue)
Howmet Research 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.