Patents by Inventor Tetsuji Senda

Tetsuji Senda 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).

  • Process for polishing surface of memory hard disc
    Patent number: 4769046
    Abstract: A composition for polishing a layer of non-electrolysis nickel plating, an alumite layer or an aluminium substrate in a memory hard disc, the composition comprising water, a polishing agent of aluminium oxide, and a polishing accelerator of one of nickel nitrate and aluminium nitrate, or two compounds, nickel nitrate and aluminium nitrate, or two compounds, nickel sulfate and aluminium nitrate.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: September 6, 1988
    Assignee: Fujimi Kanmazai Kogyo Kabushiki Kaisha of Japan
    Inventors: Tetsuji Senda, Takashi Baba
  • Polishing composition for memory hard disc
    Patent number: 4705566
    Abstract: A composition for polishing a layer of non-electrolysis nickel plating, an alumite layer or an aluminum substrate in a memory hard disc the composition comprising water, a polishing agent of aluminum oxide, and a polishing accelerator of one of nickel nitrate and aluminum nitrate, or two compounds, nickel nitrate and aluminum nitrate, or two compounds, nickel sulfate and aluminum nitrate.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: November 10, 1987
    Assignee: Fujimi Kenmazai Kogyo Kabushiki Kaisha
    Inventors: Tetsuji Senda, Takashi Baba
  • Compositions for polishing synthetic resin
    Patent number: 4225349
    Abstract: A composition for polishing synthetic resin comprises a calcined alumina polishing agent and water. The polishing agent is prepared by burning boehmite, crushing it into particles and separating particles having a predetermined particle distribution. Also disclosed is a synthetic resin polishing composition further containing as a polishing accelerator an aluminum compound selected from among aluminum nitrate, polyaluminum chloride, aluminum bromide, aluminum sulfate, aluminum iodide, aluminum chloride and aluminum phosphate and mixtures thereof.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: September 30, 1980
    Assignee: Fujimi Kenmazai Kogyo Co. Ltd.
    Inventors: Isamu Koshiyama, Tetsuji Senda