Granted Patent
Utility
US 6,420,071 · App. 09/532,168
Method for improving the durability of ion insertion materials
Inventors:
Se-Hee Lee, C. Edwin Tracy, Hyeonsik M. Cheong
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Mar 21, 2000
Inventors
Se-Hee Lee
C. Edwin Tracy
Hyeonsik M. Cheong
Assignee (at issue)
Midwest Research Institute, 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.