Granted Patent
Utility
US 6,551,744 · App. 09/723,777
Positive electrode active material and non-aqueous electrolyte secondary battery containing the same
Inventors:
Tsutomu Ohzuku, Hiroshi Yoshizawa, Masatoshi Nagayama
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Nov 28, 2000
Inventors
Tsutomu Ohzuku
Hiroshi Yoshizawa
Masatoshi Nagayama
Assignees (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
Osaka City Government
TANAKA CHEMICAL 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.