Patents by Inventor Mitsuo Onofusa

Mitsuo Onofusa 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 and apparatus for automatic analysis of fluid composition involving a time-dependent variation thereof
    Patent number: 5186895
    Abstract: An automatic analytical apparatus in which a series of operations ranging from the sampling into a treating receptacle, pretreatment, analysis and discharge of a fluid sample to the preparation for the next analysis are repeated automatically in order, wherein the time-dependent variation of the composition is traced successively. This permits the presence of the composition variation or the course of the composition variation to be confirmed or the composition variation to be controlled, automatically.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: February 16, 1993
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Mitsuo Onofusa, Nobuyoshi Hashimoto, Kimiteru Tagawa, Michiro Hagiwara
  • Process for producing ortho-alkylated phenols from anisoles
    Patent number: 4375566
    Abstract: A process for producing selectively o-alkylated phenols wherein an anisole having at least one ortho positioned hydrogen atom is contacted with a mixed oxide catalyst in the vapor phase.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: March 1, 1983
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Motoo Kawamata, Kazushi Ohshima, Mitsuo Onofusa, Akihide Kudoh, Makoto Kotani, Takeshi Tsuda
  • Process for the production of o-alkylated phenols
    Patent number: 4361709
    Abstract: A process for the production of alkyl phenols having at least one o-alkyl radical comprising catalytically reacting a phenolic compound having at least one o-positioned hydrogen atom with an alcohol in the vapor phase in the presence of a manganese oxide containing catalyst modified with a compound of at least one of the alkali metals.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: November 30, 1982
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Motoo Kawamata, Kazushi Ohshima, Mitsuo Onofusa, Akihide Kudoh, Makoto Kotani, Takeshi Tsuda