Patents by Inventor Tsuyoshi Yasutake

Tsuyoshi Yasutake 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).

  • Patent number: 6417361
    Abstract: The invention disclose a hydrogen fluoride containing composition comprising hydrogen fluoride and a compound which is liquid in the standard state (25° C., 1 atmosphere) and has a boiling point of 120° C. or more and pka of 12 or more at 25° C., and use of the composition for a fluorination agent. The compound which can be preferably used is represented by the formula (1): wherein R1 to R4 are a substituted or unsubstituted alkyl or aryl group and can be the same or different, and R1 or R2 or R3 and R4 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom, or R1 and R3 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: July 9, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hidetoshi Hayashi, Hiroshi Sonoda, Ken'ichi Goto, Kouki Fukumura, Junko Naruse, Hideaki Oikawa, Teruyuki Nagata, Takashi Shimaoka, Tsuyoshi Yasutake, Hideki Umetani, Toshio Kitashima
  • Patent number: 6395245
    Abstract: A method for preparing a carbon-containing composition is disclosed which comprises the steps of introducing, into a hot gas, a dispersion obtained by dispersing, in a decomposable carbon compound, a metal oxide and/or a metal compound which can be converted into the metal oxide by heating, to form a carbon-containing composition containing simple carbon and the corresponding metal oxide; and then collecting the formed carbon-containing composition. This carbon-containing composition is useful for the manufacture of a ceramic powder for sintering.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: May 28, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tsuyoshi Yasutake, Hideaki Miyashita, Sadaichi Komohara, Hiroshi Masuda, Tadashi Yoshino, Fumio Nakamura, Nobuyuki Sutoh
  • Patent number: 6344579
    Abstract: There is disclosed a convenient and efficient process for producing a fluorinated silicon compound which comprises reacting a silicon compound having at least one group selected from the group consisting of a hydroxyl group, an alkoxy group, and an aryloxy group bonded to silicon atom, with a compound represented by the formula (1): wherein R1, R2, R3, and R4 may be the same or different, and each represents a substituted or unsubstituted, saturated or unsaturated alkyl group, or a substituted or unsubstituted aryl group; and R1 and R2 or R3 and R4 can bond to form a ring having one or more nitrogen atoms or having one or more nitrogen atoms and other hetero atoms; or R1 and R3 can bond to form a ring having two or more nitrogen atoms or having two or more nitrogen atoms and other hetero atoms, to fluorinate the groups.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 5, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Kouki Fukumura, Takashi Shimaoka, Hideaki Oikawa, Hiroshi Sonoda, Ken'ichi Goto, Junko Naruse, Hidetoshi Hayashi, Tsuyoshi Yasutake