Granted Patent
Utility
US 6,482,275 · App. 09/601,290
Nickel based alloys for internal combustion engine valve seat inserts, and the like
Inventor:
Cong Yue Qiao
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Jul 27, 2000
Inventor
Cong Yue Qiao
Assignee (at issue)
L.E. Jones Company
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.