Patents by Inventor Matsubara Keiko

Matsubara Keiko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

Carbon-based active material for rechargeable lithium battery and method of preparing carbon-based active material

Patent number: 6656637

Abstract: Disclosed is a carbon-based active material for a rechargeable lithium battery that is capable of increasing charge and discharge efficiency of the battery. The carbon-based active material has no hydroxyl groups on a surface by heat-treating under a fluorine atmosphere.

Type: Grant

Filed: January 7, 2000

Date of Patent: December 2, 2003

Assignee: Samsung SDI Co., Ltd.

Inventors: Sang-Young Yoon, Mishima Ryoji, Tsuno Toshiaki, Matsubara Keiko
CARBON-BASED ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, RECHARGEABLE LITHIUM BATTERY, AND METHOD OF PREPARING CARBON-BASED ACTIVE MATERIAL

Publication number: 20030143463

Abstract: Disclosed is a carbon-based active material for a rechargeable lithium battery that is capable of increasing charge and discharge efficiency of the battery.

Type: Application

Filed: January 7, 2000

Publication date: July 31, 2003

Inventors: SANG-YOUNG YOON, MISHIMA RYOJI, TSUNO TOSHIAKI, MATSUBARA KEIKO

Carbon-based active material for rechargeable lithium battery and method of preparing carbon-based active material

CARBON-BASED ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, RECHARGEABLE LITHIUM BATTERY, AND METHOD OF PREPARING CARBON-BASED ACTIVE MATERIAL