Patents by Inventor Shigeyoshi Horiike

Shigeyoshi Horiike 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).

  • Publication number: 20210138482
    Abstract: A field-flow fractionation device includes a separation channel, a carrier fluid supplier, a separation membrane, a waste liquid chamber, a cross-flow flow rate adjuster, and a carrier fluid adder. The carrier fluid adder is configured to add, to a flow of a carrier fluid having passed through the separation membrane, a flow of another carrier fluid at a carrier fluid adding position set on an upstream side of the cross-flow flow rate adjuster so that the flow rate of the carrier fluid flowing into the cross-flow flow rate adjuster is larger than the flow rate of the carrier fluid having passed through the separation membrane.
    Type: Application
    Filed: April 11, 2018
    Publication date: May 13, 2021
    Applicant: SHIMADZU CORPORATION
    Inventors: Shigeyoshi HORIIKE, Jun YANAGIBAYASHI, Yukio OIKAWA, Maiko NAKAYA, Masaki KANAI
  • Publication number: 20200324272
    Abstract: The present invention provides a method for hydrophobization of a hydrophilic material, the method including introducing a hydrophobic group into a hydroxyl group (—OH group) on a surface of the hydrophilic material. A method for hydrophobization of a hydrophilic material, the method comprising reacting a hydrophilic material to be hydrophobized with a hydrophobic group-containing silylating agent in presence of an amino acid as a reaction accelerator, to introduce a hydrophobic group-containing silyl group to a surface of the hydrophilic material. A hydrophobized silica gel column filler is produced by using the method. Further, a hydrophobized silica gel column is produced by filling a column with the hydrophobized silica gel column filler.
    Type: Application
    Filed: March 6, 2020
    Publication date: October 15, 2020
    Applicant: SHIMADZU CORPORATION
    Inventors: Yukio OIKAWA, Shigeyoshi HORIIKE, Hirotaka KOYAMA
  • Publication number: 20200249208
    Abstract: Provided is a field-flow-fractionation apparatus that is configured to supply a carrier fluid to a waste fluid chamber through a fluid supply flow path at a flow rate higher than a set flow rate of a flow rate adjusting part at a timing between an end of analysis of a sample and a start of analysis of a subsequent sample, thereby forming a flow of the carrier fluid from the waste fluid chamber to the separation channel. Accordingly, the sample adhering to a separation membrane is separated from the separation membrane and is discharged from the outlet port.
    Type: Application
    Filed: January 30, 2020
    Publication date: August 6, 2020
    Inventors: Yukio OIKAWA, Shigeyoshi HORIIKE
  • Patent number: 10585073
    Abstract: A discharge ionization current detector of the present invention is used for a detector for a gas chromatograph and suitable for analyzing high-boiling components. A discharge ionization current detector 10 is mainly constituted by a plasma generating section 20 and an ion collecting section 30. Regarding the ion collecting section 30, an ion collecting electrode 31 and a bias electrode 32 are arranged, and furthermore, an insulating member made of sapphire or aluminum oxide having a purity equal to or greater than 99.5% is arranged between the ion collecting electrode 31 and the bias electrode 32.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: March 10, 2020
    Assignee: SHIMADZU CORPORATION
    Inventors: Shigeyoshi Horiike, Kei Shinada
  • Publication number: 20200003695
    Abstract: A reaction device is provided with a reaction tube and an inert gas supply passage. The reaction tube may be composed of an alumina sintered body and configured to oxidize and reduce a sample gas therein. An inert gas is supplied into the reaction tube through the inert gas supply passage. With this, since it is possible to reduce the contamination that interferes with activation of the alumina sintered body, aging time can be shortened.
    Type: Application
    Filed: March 7, 2018
    Publication date: January 2, 2020
    Inventors: Shigeyoshi HORIIKE, Isao KATASYO
  • Publication number: 20190317057
    Abstract: A field flow fractionation apparatus includes a separation channel provided with an inlet port and an outlet port at both ends and forming a space through which a carrier fluid flows between the inlet port and the outlet port, a separation membrane which is a wall surface that defines the separation channel and is parallel to a channel flow in which a carrier fluid flows in the separation channel from the inlet port toward the outlet port, and has a property of permeating the carrier fluid and not permeating particles to be separated, and a discharge port that discharges the carrier fluid having permeated through the separation membrane to outside. At least a part of the surface of the separation membrane is an ion exchangeable region in which a functional group having ion exchangeability is modified.
    Type: Application
    Filed: April 10, 2019
    Publication date: October 17, 2019
    Applicant: SHIMADZU CORPORATION
    Inventors: Yukio OIKAWA, Shigeyoshi Horiike, Maiko Nakaya, Masaki Kanai
  • Patent number: 10161906
    Abstract: To widen the dynamic range of a dielectric barrier ionization detector (BID), an insertion length of a sample injection tube 16 into a second gas passage 11 is set so that a sample-gas ejection port 16a is located on the downstream side of a dilution gas from the upper edge of a collector electrode 14 at which a DC electric field concentrates. By this setting, although the detection sensitivity is lower than in the case where the sample-gas ejection port 16a is placed to maximize the detection sensitivity, the decrease in the detection sensitivity to high-concentration samples is reduced since absorption of light by the sample gas is alleviated. Consequently, the sample-concentration range with a linearly-changing sensitivity becomes wider than that of conventional BIDs. Although the detection sensitivity becomes lower than that of conventional BIDs, a detection sensitivity adequately higher than that of FIDs can be ensured.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: December 25, 2018
    Assignee: SHIMADZU CORPORATION
    Inventors: Kei Shinada, Shigeyoshi Horiike
  • Patent number: 9791410
    Abstract: A low-OH-content quartz glass with an OH content equal to or lower than 5 ppm is used as a cylindrical tube (2) covering the surface of metallic plasma generation electrodes (4, 5 and 6) for generating a low-frequency barrier discharge. It has been found that, in the low-frequency barrier discharge, hydrogen and oxygen originating from the OH contained in a dielectric material are released into plasma gas for a long period of time, constituting a primary cause of an increase in the baseline current. The use of a low-OH-content quartz glass dramatically lowers the baseline current and thereby improves the S/N ratio and the detection limit.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: October 17, 2017
    Assignee: Shimadzu Corporation
    Inventors: Kei Shinada, Shigeyoshi Horiike, Takahiro Nishimoto
  • Patent number: 9784713
    Abstract: Provided is a discharge ionization current detector that is highly durable and yet can be produced at a low cost. An electrode structure 19 consisting of a dielectric-coated metal tube 16, with an insulator-coated metal wire 18 included therein, is inserted from above into a first gas passage including a dielectric tube 10. The metal tube 16 is connected to the ground on the upstream side of the first gas passage. One end of the metal wire 18 is extracted from the upstream side of the first gas passage to the outside and connected to a bias power source 33. An area which is not covered with the insulator is provided at the other end of the wire 18. This area is arranged in a second gas passage, which extends from the downstream end of the first gas passage. A metal electrode consisting of a flanged metal tube 28 is placed in the second gas passage and connected to an ion current detecting circuit 34.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: October 10, 2017
    Assignee: Shimadzu Corporation
    Inventors: Kei Shinada, Shigeyoshi Horiike
  • Patent number: 9784714
    Abstract: An adjusting method for a discharge ionization current detector of the present invention is provided for a discharge ionization current detector for a gas chromatograph, which improves the precision and reproducibility of measurements results of the detector. The discharge ionization current detector adjusts at least one of purity of introduced helium gas, a flow rate of the introduced helium gas, an amplitude of voltage of the low-frequency dielectric barrier discharge, and a frequency of the voltage of the low-frequency dielectric barrier discharge so that intensity of light having a wavelength of 640 nm reaches the maximum in a range of wavelengths of 250 to 700 nm with respect to light emitted by the helium plasma.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: October 10, 2017
    Assignee: SHIMADZU CORPORATION
    Inventors: Kei Shinada, Shigeyoshi Horiike
  • Patent number: 9535034
    Abstract: A suppressor is structured by an ion exchange section being structured by an eluate path forming member forming an eluate path and a regenerant path forming member forming a regenerant path being stacked across an ion exchange film, and a heat-conductive heat block covering the outside of the ion exchange section. A separation column, the suppressor, and an electrical conductivity meter are accommodated in a common constant temperature bath. The inside of the constant temperature bath is feedback-controlled by a temperature control section so as to be maintained at constant temperature.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: January 3, 2017
    Assignee: SHIMADZU CORPORATION
    Inventors: Katsumasa Sakamoto, Yukio Oikawa, Shigeyoshi Horiike
  • Patent number: 9513257
    Abstract: An aging treatment is performed by using cleaning gas obtained by mixing inert gas, as an impurity, to plasma gas. Plasma generation by dielectric-barrier discharge is performed until a predetermined period of time has elapsed by applying high AC voltage to an electrode while supplying the cleaning gas to a dielectric tube from a gas inlet.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: December 6, 2016
    Assignee: SHIMADZU CORPORATION
    Inventors: Shigeyoshi Horiike, Kei Shinada, Takahiro Nishimoto
  • Patent number: 9366656
    Abstract: An analysis device comprising a discharge ionization current detector, a plasma gas supply section, a sample gas supply section, a flow rate setting condition holding section and a gas flow rate setting means controller. The flow rate setting condition holding section holds, as a flow rate setting condition, a relationship between a sample gas supply flow rate from the sample gas supply section and a supply flow rate of plasma gas to be set with respect to the sample gas supply flow rate and the gas flow rate controller is configured to set a plasma gas supply flow rate from the plasma gas supply section to a flow rate according to the sample gas supply flow rate, based on the flow rate setting condition held in the flow rate setting condition holding section.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: June 14, 2016
    Assignee: SHIMADZU CORPORATION
    Inventors: Kei Shinada, Shigeyoshi Horiike, Takahiro Nishimoto
  • Publication number: 20150377844
    Abstract: A discharge ionization current detector of the present invention is used for a detector for a gas chromatograph and suitable for analyzing high-boiling components. A discharge ionization current detector 10 is mainly constituted by a plasma generating section 20 and an ion collecting section 30. Regarding the ion collecting section 30, an ion collecting electrode 31 and a bias electrode 32 are arranged, and furthermore, an insulating member made of sapphire or aluminum oxide having a purity equal to or greater than 99.5% is arranged between the ion collecting electrode 31 and the bias electrode 32.
    Type: Application
    Filed: February 15, 2013
    Publication date: December 31, 2015
    Applicant: SHIMADZU CORPORATION
    Inventors: Shigeyoshi HORIIKE, Kei SHINADA
  • Publication number: 20150369777
    Abstract: An adjusting method for a discharge ionization current detector of the present invention is provided for a discharge ionization current detector for a gas chromatograph, which improves the precision and reproducibility of measurements results of the detector. The discharge ionization current detector adjusts at least one of purity of introduced helium gas, a flow rate of the introduced helium gas, an amplitude of voltage of the low-frequency dielectric barrier discharge, and a frequency of the voltage of the low-frequency dielectric barrier discharge so that intensity of light having a wavelength of 640 nm reaches the maximum in a range of wavelengths of 250 to 700 nm with respect to light emitted by the helium plasma.
    Type: Application
    Filed: February 15, 2013
    Publication date: December 24, 2015
    Applicant: SHIMADZU CORPORATION
    Inventors: Kei SHINADA, Shigeyoshi HORIIKE
  • Publication number: 20150253286
    Abstract: To widen the dynamic range of a dielectric barrier ionization detector (BID), an insertion length of a sample injection tube 16 into a second gas passage 11 is set so that a sample-gas ejection port 16a is located on the downstream side of a dilution gas from the upper edge of a collector electrode 14 at which a DC electric field concentrates. By this setting, although the detection sensitivity is lower than in the case where the sample-gas ejection port 16a is placed to maximize the detection sensitivity, the decrease in the detection sensitivity to high-concentration samples is reduced since absorption of light by the sample gas is alleviated. Consequently, the sample-concentration range with a linearly-changing sensitivity becomes wider than that of conventional BIDs. Although the detection sensitivity becomes lower than that of conventional BIDs, a detection sensitivity adequately higher than that of FIDs can be ensured.
    Type: Application
    Filed: February 2, 2015
    Publication date: September 10, 2015
    Applicant: SHIMADZU CORPORATION
    Inventors: Kei Shinada, Shigeyoshi Horiike
  • Patent number: 8970221
    Abstract: A discharge ionization current detector capable of supplying plasma gas in large quantity to stabilize plasma simultaneously with lowering the sample dilution ratio to improve detection sensitivity is provided. A gas supply pipe 7 for supplying a plasma gas, which also functions as a dilution gas, is connected to a point near the connecting section of a first gas passage 3 having electrodes 4-6 for plasma generation and a second gas passage having electrodes 16 and 17 for ion detection. A first gas discharge pipe 8 is connected to the other end of the first gas passage 3, and a second gas discharge pipe 13 is connected to the other end of the second gas passage 11. Flow controllers 9 and 14 are provided in the gas discharge pipes 8 and 13, respectively. The flow rate of the gas passing through a plasma generation area and that of the gas passing through an ion current detection area can be independently regulated.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: March 3, 2015
    Assignee: Shimadzu Corporation
    Inventors: Kei Shinada, Shigeyoshi Horiike, Takahiro Nishimoto
  • Publication number: 20150054521
    Abstract: An aging treatment is performed by using cleaning gas obtained by mixing inert gas, as an impurity, to plasma gas. Plasma generation by dielectric-barrier discharge is performed until a predetermined period of time has elapsed by applying high AC voltage to an electrode while supplying the cleaning gas to a dielectric tube from a gas inlet.
    Type: Application
    Filed: March 15, 2012
    Publication date: February 26, 2015
    Applicant: SHIMADZU CORPORATION
    Inventors: Shigeyoshi Horiike, Kei Shinada, Takahiro Nishimoto
  • Publication number: 20150042354
    Abstract: An analysis device comprising a discharge ionization current detector, a plasma gas supply section, a sample gas supply section, a flow rate setting condition holding section and a gas flow rate setting means controller. The flow rate setting condition holding section holds, as a flow rate setting condition, a relationship between a sample gas supply flow rate from the sample gas supply section and a supply flow rate of plasma gas to be set with respect to the sample gas supply flow rate and the gas flow rate controller is configured to set a plasma gas supply flow rate from the plasma gas supply section to a flow rate according to the sample gas supply flow rate, based on the flow rate setting condition held in the flow rate setting condition holding section.
    Type: Application
    Filed: February 20, 2013
    Publication date: February 12, 2015
    Inventors: Kei Shinada, Shigeyoshi Horiike, Takahiro Nishimoto
  • Publication number: 20140320146
    Abstract: A suppressor is structured by an ion exchange section being structured by an eluate path forming member forming an eluate path and a regenerant path forming member forming a regenerant path being stacked across an ion exchange film, and a heat-conductive heat block covering the outside of the ion exchange section. A separation column, the suppressor, and an electrical conductivity meter are accommodated in a common constant temperature bath. The inside of the constant temperature bath is feedback-controlled by a temperature control section so as to be maintained at constant temperature.
    Type: Application
    Filed: October 15, 2012
    Publication date: October 30, 2014
    Inventors: Katsumasa Sakamoto, Yukio Oikawa, Shigeyoshi Horiike