Patents by Inventor Hiroki Tsunomachi

Hiroki Tsunomachi 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 for preparing sulfones
    Patent number: 5248828
    Abstract: A method for preparing a sulfone represented by the following formula: ##STR1## wherein R' represents a lower alkyl group, an aryl group or an aryl group whose nucleus has at least one substituent selected from the group consisting of a halogen atom, nitro group, a lower alkyl group, phenyl group and a phenyl group substituted with a halogen atom, or an alkali metal salt thereof. A sulfonic acid ester of 4-hydroxybiphenyl is condensed at a temperature of 0.degree. to 200.degree. C. in a presence of a Lewis acid or a super-strong acid with a sulfonyl chloride represented by the formula R'SO.sub.2 Cl, wherein R' is the same as that defined above.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: September 28, 1993
    Assignee: Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Toranosuke Saito, Shigeru Oda, Hiroki Tsunomachi, Daishiro Kishimoto
  • Engineering plastic composition and articles made of the same
    Patent number: 5236988
    Abstract: An engineering plastic composition with excellent flowability, heat stability, and desirable mechanical properties is provided. The composition contains an engineering plastic material and an aliphatic polyester.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: August 17, 1993
    Assignees: Sekisui Chemical Co., Ltd., Kabushiki Kaisha Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Kazuo Doyama, Makoto Yamaguchi, Makoto Ohsuga, Akihiro Niki, Toranosuke Saito, Hiroki Tsunomachi, Daishiro Kishimoto
  • Polyester and an article made of the same
    Patent number: 5235024
    Abstract: A polyester is provided that comprises as main monomer components thereof a dicarboxylic acid and a diol, including a p-quaterphenyl derivative of specific formula. The use of appropriate kinds of dicarboxylic acid for the polyester makes it possible to obtain a thermoplastic elastomer or an engineering platic material (i.e., liquid-crystal polymer).
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: August 10, 1993
    Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Kabushiki Kaisha Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Akihiro Niki, Makoto Ohsuga, Toshio Uesaka, Toranosuke Saito, Hiroki Tsunomachi, Kazuo Doyama, Makoto Yamaguchi, Daishiro Kishimoto
  • Method for preparing sulfones
    Patent number: 5235084
    Abstract: A method for preparing a sulfone represented by the following formula: ##STR1## wherein R and R' each represent a lower alkyl group, an aryl group or an aryl group whose nucleus has at least one substituent selected from the group consisting of a halogen atom, nitro group, a lower alkyl group, phenyl group and a phenyl group substituted with a halogen atom, comprises the step of condensing a sulfonic acid ester of 4-hydroxybiphenyl represented by the following formula: ##STR2## with a sulfonyl chloride of R'SO.sub.2 Cl at a temperature of 0.degree. to 200.degree. C. in the presence of a Lewis acid or a superstrong acid.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: August 10, 1993
    Assignee: Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Toranosuke Saito, Shigeru Oda, Hiroki Tsunomachi, Daishiro Kishimoto
  • Polyester and an article made of the same comprising a p-quaterphenyl derivative
    Patent number: 5191057
    Abstract: A polyester is provided that comprises as main monomer components thereof a dicarboxylic acid and a diol, including a p-quaterphenyl derivative of specific formula. The use of appropriate kinds of dicarboxylic acid for the polyester makes it possible to obtain a thermoplastic elastomer or an engineering plastic material (i.e., liquid-crystal polymer).
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: March 2, 1993
    Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Kabushiki Kaisha Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Akihiro Niki, Makoto Ohsuga, Toshio Uesaka, Toranosuke Saito, Hiroki Tsunomachi, Kazuo Doyama, Makoto Yamaguchi, Daishiro Kishimoto
  • Engineering plastic composition and an article made of the same
    Patent number: 5011879
    Abstract: An engineering plastic composition with excellent flowability, heat stability, and desirable mechanical properties is provided. The composition comprises an engineering plastic material and at least one p-quaterphenyl derivative of specific formula.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: April 30, 1991
    Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Kabushiki Kaisha Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Toshio Uesaka, Akihiro Niki, Makoto Ohsuga, Toranosuke Saito, Hiroki Tsunomachi, Makoto Yamaguchi, Kazuo Doyama, Daishiro Kishimoto
  • Process for the preparation of p-benzoquinone
    Patent number: 4973720
    Abstract: There is provided a process of producing p-benzoquinone, wherein hydroquinone and hydrogen peroxide are reacted in water, an aqueous inorganic acid solution, an inert organic polar solvent or a mixture of water with an inert organic polar solvent in the presence of a catalyst selected from the group consisting of iodine, hydrogen iodide, and iodine compounds of metals.According to the process, p-benzoquinone can be obtained from hydroquinone with the yield and the quality of the p-benzoquinone being high without requiring any special facilities, equipments and operations.
    Type: Grant
    Filed: October 4, 1988
    Date of Patent: November 27, 1990
    Assignee: Sanko Kaihatsu Kagaku Kenkyusho
    Inventors: Toranosuke Saito, Kenichi Ikemoto, Hiroki Tsunomachi, Katsuya Sakaguchi