Patents by Inventor Yahachi Saito

Yahachi Saito 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).

  • Method for producing carbon nanotubes
    Patent number: 6455021
    Abstract: The method of the present invention deposits carbon nanotubes by contacting carbon vapor with a non-magnetic transition metal including at least two elements selected from the group consisting of ruthenium, rhodium, palladium, and platinum. For example, carbon vapor and particulates of the non-magnetic transition metal are generated by arc discharge between a rod-shaped anode containing carbon and the non-magnetic transition metal, and a rod-shaped cathode opposing to the anode, and carbon nanotubes are deposited on a base portion of the cathode. The arc discharge is performed in a reactor chamber containing inert gas or the mixture of inert gas and hydrogen gas, at a pressure ranging from 50 to 1500 Torr.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: September 24, 2002
    Assignee: Showa Denko K.K.
    Inventor: Yahachi Saito
  • PRODUCTION OF CARBON NANOTUBE
    Publication number: 20020031465
    Abstract: The method of the present invention deposits carbon nanotubes by contacting carbon vapor with a non-magnetic transition metal including at least two elements selected from the group consisting of ruthenium, rhodium, palladium, and platinum. For example, carbon vapor and particulates of the non-magnetic transition metal are generated by arc discharge between a rod-shaped anode containing carbon and the non-magnetic transition metal, and a rod-shaped cathode opposing to the anode, and carbon nanotubes are deposited on a base portion of the cathode. The arc discharge is performed in a reactor chamber containing inert gas or the mixture of inert gas and hydrogen gas, at a pressure ranging from 50 to 1500 Torr.
    Type: Application
    Filed: July 20, 1999
    Publication date: March 14, 2002
    Inventor: YAHACHI SAITO
  • Electron-emitting source and method of manufacturing the same
    Patent number: 6239547
    Abstract: An electron-emitting source of this invention includes at least a carbon nanotube formed from a columnar graphite layer. Electron are emitted from the tip of the carbon nanotube.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: May 29, 2001
    Assignee: Ise Electronics Corporation
    Inventors: Sashiro Uemura, Takeshi Nagasako, Junko Yotani, Mitsuaki Morikawa, Yahachi Saito