Patents by Inventor Tsumoru Fujii

Tsumoru Fujii 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).

  • Electrostatic positioner
    Patent number: 5303117
    Abstract: An electrostatic positioner with one or more first electrodes for producing forces to confine a charged specimen in the direction perpendicular to a center axis and second electrodes for producing forces to confine the charged specimen in the direction of the center axis.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: April 12, 1994
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Masaaki Ogihara, Michio Aoyama, Tsumoru Fujii, Yuji Ikegami, Joji Shinohara
  • Process for separating cobalt and nickel from a solution containing cobalt and nickel
    Patent number: 4246240
    Abstract: An acid solution containing cobalt and nickel is contacted with an organic extraction medium comprising alkyl phosphonic acid mono alkyl ester where said alkyl group has 8-10 carbon atoms in two or more stages, wherein the contact at a first stage is carried out at a pH value not exceeding 5.0 and at a second and further stages being carried out at a pH range of 5.5-7.0. Thereby cobalt may effectively and selectively be extracted into the organic extraction medium from the solution without excess rise in viscosity. Cobalt and nickel may be separately recovered with high purity.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: January 20, 1981
    Assignee: Nippon Mining Co., Ltd.
    Inventors: Takashi Ogata, Shoichiro Namihisa, Tsumoru Fujii