Patents by Inventor Shuetsu Ogasawara

Shuetsu Ogasawara 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).

  • Methods for manufacturing capacitors and electrodes using ultrafine nickel powder
    Patent number: 6881377
    Abstract: Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its internal electrode can be made into a thinner layer, and the electric risistivity of the capacitor-can be made low. The ultrafine nickel powder has an average particle size of 0.1-1.0 ?m, having the sulfur content of 0.02-1.0% by weight, and particles thereof being spherical, thereby exhibiting excellent properties. They can be produced by vapor phase hydrogen-reducing process using nickel chloride vapor.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: April 19, 2005
    Assignee: Kawatetsu Mining Co., Ltd.
    Inventors: Hideshi Katayama, Kan Saito, Shuetsu Ogasawara, Takao Hamada
  • Methods for manufacturing capacitors and electrodes using ultrafine nickel powder
    Publication number: 20030196516
    Abstract: Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its internal electrode can be made into a thinner layer, and the electric risistivity of the capacitor-can be made low. The ultrafine nickel powder has an average particle size of 0.1-1.0 &mgr;m, having the sulfur content of 0.02-1.0% by weight, and particles thereof being spherical, thereby exhibiting excellent properties. They can be produced by vapor phase hydrogen-reducing process using nickel chloride vapor.
    Type: Application
    Filed: May 21, 2003
    Publication date: October 23, 2003
    Applicant: KAWATETSU MINING CO., LTD.
    Inventors: Hideshi Katayama, Kan Saito, Shuetsu Ogasawara, Takao Hamada
  • Ultrafine nickel powder
    Patent number: 6596052
    Abstract: Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its internal electrode can be made into a thinner layer, and the electric risistivity of the capacitor can be made low. The ultrafine nickel powder has an average particle size of 0.1-1.0 &mgr;m, having the sulfur content of 0.02-1.0% by weight, and particles thereof being spherical, thereby exhibiting excellent properties. They can be produced by vapor phase hydrogen-reducing process using nickel chloride vapor.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: July 22, 2003
    Assignee: Kamatetsu Mining Co., Ltd.
    Inventors: Hideshi Katayama, Kan Saito, Shuetsu Ogasawara, Takao Hamada
  • Ultrafine nickel powder
    Patent number: 6402803
    Abstract: Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its internal electrode can be made into a thinner layer, and the electric risistivity of the capacitor can be made low. The ultrafine nickel powder has an average particle size of 0.1-1.0 &mgr;m, having the sulfur content of 0.02-1.0% by weight, and particles thereof being spherical, thereby exhibiting excellent properties. They can be produced by vapor phase hydrogen-reducing process using nickel chloride vapor.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: June 11, 2002
    Assignee: Kawatetsu Mining Co., Ltd.
    Inventors: Hideshi Katayama, Kan Saito, Shuetsu Ogasawara, Takao Hamada
  • Ultrafine nickel powder
    Publication number: 20020035891
    Abstract: Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its internal electrode can be made into a thinner layer, and the electric risistivity of the capacitor can be made low. The ultrafine nickel powder has an average particle size of 0.1-1.0 &mgr;&mgr;m, having the sulfur content of 0.02-1.0 % by weight, and particles thereof being spherical, thereby exhibiting excellent properties. They can be produced by vapor phase hydrogen-reducing process using nickel chloride vapor.
    Type: Application
    Filed: October 10, 2001
    Publication date: March 28, 2002
    Applicant: Kawatetsu Mining Co., Ltd.
    Inventors: Hideshi Katayama, Kan Saito, Shuetsu Ogasawara, Takao Hamada
  • High purity iron oxide and method for production hereof
    Patent number: 5316746
    Abstract: A method for producing high-purity iron oxide which comprises pulverizing iron ore into powder having an average particle diameter of 20-150 .mu.m, removing fine particles from the powder, and subjecting the powder to wet magnetic separation in a magnetic field of 1000-15000 gauss for the removal of impurities. The iron oxide powder may undergo the secondary steps of pulverization and classification, which are performed by the combination of a wet grinding means and a wet cyclone, and drying and calcination.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: May 31, 1994
    Assignees: Kawasaki Steel Corporation, Kawatetsu Mining Co., Ltd.
    Inventors: Yuuki Narita, Takero Ito, Shuetsu Ogasawara