Granted Patent
Utility
US 6,139,990 · App. 09/151,024
Modified graphite particles derived from scaly natural ones, production thereof and secondary battery
Inventors:
Satoshi Kubota, Hirokazu Koyanagi, Kojiro Tenno, Syun Saito
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Sep 10, 1998
Inventors
Satoshi Kubota
Hirokazu Koyanagi
Kojiro Tenno
Syun Saito
Assignee (at issue)
Kansai Netukagaku Kabushiki Kaisha
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.