Patents by Inventor Kazuki Sugawara

Kazuki Sugawara 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: 10414724
    Abstract: Provided is a photochemical reaction device wherein two partitions formed from an optically transparent material are arranged apart from each other between a light source and a reaction liquid, and an optically transparent fluid introduction/discharge means for introducing an optically transparent fluid between the partitions and discharging the fluid and a state change detection means for detecting a change in the state of the optically transparent fluid at the discharge side of the optically transparent fluid introduction/discharge means are provided. Also provided are a photochemical reaction method that uses the photochemical reaction device and a lactam production method that uses the photochemical reaction method. The present invention prevents decreases in the performance of the light source even when the optically transparent material in the photochemical reaction device is damaged, and makes it possible to reliably prevent ignition even if the reaction liquid is a flammable liquid.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: September 17, 2019
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Takenori Sugimoto, Toru Takahashi, Kazuki Sugawara
  • Publication number: 20170298015
    Abstract: Provided is a photochemical reaction device wherein two partitions formed from an optically transparent material are arranged apart from each other between a light source and a reaction liquid, and an optically transparent fluid introduction/discharge means for introducing an optically transparent fluid between the partitions and discharging the fluid and a state change detection means for detecting a change in the state of the optically transparent fluid at the discharge side of the optically transparent fluid introduction/discharge means are provided. Also provided are a photochemical reaction method that uses the photochemical reaction device and a lactam production method that uses the photochemical reaction method. The present invention prevents decreases in the performance of the light source even when the optically transparent material in the photochemical reaction device is damaged, and makes it possible to reliably prevent ignition even if the reaction liquid is a flammable liquid.
    Type: Application
    Filed: September 17, 2015
    Publication date: October 19, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Takenori Sugimoto, Toru Takahashi, Kazuki Sugawara
  • Publication number: 20170238381
    Abstract: Provided are a three-phase AC/DC converter disposed between a three-phase AC power supply and a light emitting diode group, the converter including a three-phase full bridge circuit in which pairs of switching elements are connected in parallel between DC buses for the three phases of the three-phase AC power supply; reactors connecting connection portions between the switching elements and corresponding phases of the three-phase AC power supply; a smoothing capacitor on the output side of the three-phase full bridge circuit; a DC voltage detection means; a power supply voltage phase detection means; and a pulse width modulation means for outputting pulse width modulation signals of the switching elements, wherein the pulse width modulation means outputs the pulse width modulation signals based on a power supply voltage phase and an output voltage between the DC buses.
    Type: Application
    Filed: September 18, 2015
    Publication date: August 17, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Fumikatsu Ohno, Toru Takahashi, Hiroyasu Ito, Kazuki Sugawara
  • Patent number: 8222429
    Abstract: The present invention provides a photolabile protecting group that can be removed by light irradiation under mild conditions. More specifically, the present invention provides a method comprising protecting a reactive functional group (e.g., a hydroxyl group, amino group, carboxyl group, carbonyl group, phosphodiester group, etc.) by the photolabile protecting group, and then removing the photolabile protecting group simply by light irradiation under neutral conditions. The present invention relates to a compound represented by Formula (3): wherein Ar1 is an optionally substituted aromatic or heteroaromatic ring, Ar2 is an optionally substituted aryl or heteroaryl group, X is a leaving group, and n is an integer of 1 or 2; and a method of protecting and deprotecting an amino group etc. using the compound.
    Type: Grant
    Filed: January 8, 2009
    Date of Patent: July 17, 2012
    Assignee: National University Corporation Nara Institute of Science and Technology
    Inventors: Kazuki Sugawara, Yoshinori Gosyo
  • Publication number: 20110028738
    Abstract: The present invention provides a photolabile protecting group that can be removed by light irradiation under mild conditions. More specifically, the present invention provides a method comprising protecting a reactive functional group (e.g., a hydroxyl group, amino group, carboxyl group, carbonyl group, phosphodiester group, etc.) by the photolabile protecting group, and then removing the photolabile protecting group simply by light irradiation under neutral conditions. The present invention relates to a compound represented by Formula (3): wherein Ar1 is an optionally substituted aromatic or heteroaromatic ring, Ar2 is an optionally substituted aryl or heteroaryl group, X is a leaving group, and n is an integer of 1 or 2; and a method of protecting and deprotecting an amino group etc. using the compound.
    Type: Application
    Filed: January 8, 2009
    Publication date: February 3, 2011
    Applicant: National University Corporation Nara Institute of Science and Technology
    Inventors: Kiyomi Kakiuchi, Ken Tsutsumi, Satoru Kitani, Kazuki Sugawara, Yoshinori Gosyo