Patents by Inventor Tokuyuki Yoshimoto

Tokuyuki Yoshimoto 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: 7247755
    Abstract: The present invention provides a process for producing an ?,?-bis(hydroxymethyl)alkanal represented by Formula (II): (wherein R represents an alkyl group, a cycloalkyl group, or an aryl group) which comprises reacting an aldehyde represented by Formula (I): R—CH2—CHO ??(I) (wherein R has the same meaning as defined above) with formaldehyde in the presence of a basic catalyst and a phase-transfer catalyst.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: July 24, 2007
    Assignee: Kyowa Hakko Chemical Co., Ltd.
    Inventors: Shinichi Konishi, Shingo Nakayama, Yukihiro Isogai, Tokuyuki Yoshimoto
  • Publication number: 20070112221
    Abstract: The present invention provides a process for producing an ?,?-bis(hydroxymethyl)alkanal represented by Formula (II): (wherein R represents an alkyl group, a cycloalkyl group, or an aryl group) which comprises reacting an aldehyde represented by Formula (I): R—CH2—CHO??(I) (wherein R has the same meaning as defined above) with formaldehyde in the presence of a basic catalyst and a phase-transfer catalyst.
    Type: Application
    Filed: July 22, 2004
    Publication date: May 17, 2007
    Applicant: Kyowa Hakko Chemical Co., Ltd.
    Inventors: Shinichi Konishi, Shingo Nakayama, Yukihiro Isogai, Tokuyuki Yoshimoto
  • Patent number: 6734151
    Abstract: A process for efficiently producing a high purity compound having oxygen which has a high volume specific resistance and a lubricating oil comprising the high purity compound having oxygen are provided. The process for producing a high purity compound having oxygen selected from a group consisting of high purity polyvinyl ether compounds, high purity polyalkylene glycol compounds, high purity polyol ester compounds, high purity cyclic polyether compounds and high purity carbonate compounds comprises a step of treating with an adsorbent at least one crude compound having oxygen selected from a group consisting of crude polyvinyl ether compounds, crude polyalkylene glycol compounds, crude polyol ester compounds, crude cyclic polyether compounds and crude carbonate compounds. The lubricating oil comprises the high purity compound having oxygen obtained in accordance with this process.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: May 11, 2004
    Assignees: Idemitsu Kosan Co., Ltd., Kyowa Yuka Co., Ltd.
    Inventors: Minoyuki Kubota, Kazuhiko Suzuki, Hirotaka Yamazaki, Tokuyuki Yoshimoto, Akihisa Ogawa, Shigeru Kamimori
  • Patent number: 6087539
    Abstract: A process for producing an ether compound represented by the general formula (II) or (III): ##STR1## wherein R.sup.1 and R.sup.2 represent each an alkyl group or a cycloalkyl group and n represents an integer of 1 to 50, which comprises bringing an acetal compound represented by the general formula (I): ##STR2## into reaction with hydrogen in the presence of a solid catalyst comprising (A) nickel in an amount corresponding to 10 to 70% by weight of metallic nickel, and (B) at least one compound selected from the group consisting of oxides of silicon, aluminum, magnesium, titanium, and zirconium; and synthetic or natural inorganic oxides containing one or more of these oxides as the constituents thereof. A vinyl ether polymer having a terminal ether group can be obtained with a good yield without causing corrosion of the apparatus used for the reaction.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: July 11, 2000
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hirotaka Yamasaki, Akihisa Ogawa, Shigeru Kamimori, Yoshikazu Hirao, Keiji Fujita, Tokuyuki Yoshimoto