Patents by Inventor Hirofumi Koike

Hirofumi Koike 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: 10807961
    Abstract: A method for producing propylene oxide involves an oxidation step, a distillation step, an epoxidation step, and a separation step. The distillation step involves distilling the reaction mixture containing cumene hydroperoxide to separate it into a concentrate containing cumene hydroperoxide and a distillate. The reaction mixture is continuously distilled so that the ratio of the flow rate of the distillate to the flow rate of the reaction mixture to be distilled is 0.037 to 0.13. The epoxidation step involves obtaining a reaction mixture containing propylene oxide and cumyl alcohol by contacting the concentrate with propylene in the presence of a catalyst in one or more reactors to cause a reaction between propylene and cumene hydroperoxide in the concentrate, in which the outlet temperature of the final reactor is adjusted to 115° C. or more and less than 140° C.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: October 20, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hirofumi Koike, Tomonori Kawabata, Takuo Takemoto, Motoshi Nakamura, Satoru Takemoto
  • Publication number: 20200140403
    Abstract: A method for producing propylene oxide involves an oxidation step, a distillation step, an epoxidation step, and a separation step. The distillation step involves distilling the reaction mixture containing cumene hydroperoxide to separate it into a concentrate containing cumene hydroperoxide and a distillate. The reaction mixture is continuously distilled so that the ratio of the flow rate of the distillate to the flow rate of the reaction mixture to be distilled is 0.037 to 0.13. The epoxidation step involves obtaining a reaction mixture containing propylene oxide and cumyl alcohol by contacting the concentrate with propylene in the presence of a catalyst in one or more reactors to cause a reaction between propylene and cumene hydroperoxide in the concentrate, in which the outlet temperature of the final reactor is adjusted to 115° C. or more and less than 140° C.
    Type: Application
    Filed: July 25, 2017
    Publication date: May 7, 2020
    Inventors: Hirofumi KOIKE, Tomonori KAWABATA, Takuo TAKEMOTO, Motoshi NAKAMURA, Satoru TAKEMOTO
  • Patent number: 10350920
    Abstract: A printing apparatus that has a plurality of functions including a printing function and is capable of executing printing with resolution of 300 dpi or more includes a plurality of operating units including a printing unit and a power supply unit. The power supply unit includes a substrate, an input terminal that receives an alternating voltage, a smoothing capacitor that smooths the alternating voltage, a thermistor that detects a temperature, and a comparator that compares a signal output from the thermistor with a standard signal and outputs a notification signal. The input terminal, the smoothing capacitor, the thermistor, and the comparator are mounted on the substrate. The supply of power from the power supply unit is stopped based on the state of the notification signal. A gap between the input terminal and the thermistor is longer than a gap between the input terminal and the smoothing capacitor.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: July 16, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Hirofumi Koike, Tomonori Yamada, Toru Matsuyama
  • Publication number: 20180170079
    Abstract: A printing apparatus that has a plurality of functions including a printing function and is capable of executing printing with resolution of 300 dpi or more includes a plurality of operating units including a printing unit and a power supply unit. The power supply unit includes a substrate, an input terminal that receives an alternating voltage, a smoothing capacitor that smooths the alternating voltage, a thermistor that detects a temperature, and a comparator that compares a signal output from the thermistor with a standard signal and outputs a notification signal. The input terminal, the smoothing capacitor, the thermistor, and the comparator are mounted on the substrate. The supply of power from the power supply unit is stopped based on the state of the notification signal. A gap between the input terminal and the thermistor is longer than a gap between the input terminal and the smoothing capacitor.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 21, 2018
    Inventors: Hirofumi KOIKE, Tomonori YAMADA, Toru MATSUYAMA
  • Publication number: 20150050420
    Abstract: A method for manufacturing a metal film being formed on a surface of a non-electric conductive base material includes processes of a deposition process of releasing a metal being formed in a particle or being vaporized from at least one of targets, the target being made of solid metal and depositing a metal thin film on the surface of the base material by having the released metal hit the surface of the base material from a plurality of directions; and a crack forming process of forming a crack in the metal thin film by applying thermal stress to the metal thin film.
    Type: Application
    Filed: July 18, 2014
    Publication date: February 19, 2015
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takashi HARA, Hirofumi KOIKE, Kazuki MIZUTANI
  • Patent number: 7658538
    Abstract: A method for evaluating a solder joint portion by means of which a part and a substrate are joined to each other includes a preparation process for preparing the substrate including the solder joint portion, a thermal shock process for applying thermal shock to the solder joint portion multiple times, and an evaluation process for obtaining a change of a crystal grain size in the solder joint portion caused by the application of the thermal shock so as to evaluate a lifespan of the solder joint portion based on the change of the crystal grain size obtained.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: February 9, 2010
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Hirofumi Koike, Akikazu Matsumoto, Wataru Yagi, Takefumi Isogai, Yoshiharu Hirose, Hiroaki Kadoura, Juntaro Seki, Hisaaki Takao
  • Publication number: 20080240201
    Abstract: A method for evaluating a solder joint portion by means of which a part and a substrate are joined to each other includes a preparation process for preparing the substrate including the solder joint portion, a thermal shock process for applying thermal shock to the solder joint portion multiple times, and an evaluation process for obtaining a change of a crystal grain size in the solder joint portion caused by the application of the thermal shock so as to evaluate a lifespan of the solder joint portion based on the change of the crystal grain size obtained.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 2, 2008
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hirofumi KOIKE, Akikazu MATSUMOTO, Wataru YAGI, Takefumi ISOGAI, Yoshiharu HIROSE, Hiroaki KADOURA, Juntaro SEKI, Hisaaki TAKAO
  • Patent number: 6815326
    Abstract: An object of the present invention is to provide a technique for forming an ohmic connection between a semiconductor and a metal efficiently in a short period of time. The present invention provides a method of forming at least one electrode on a surface of a semiconductor, wherein a metal or alloy for the electrode is rubbed against a predetermined region of the semiconductor surface so as to be adhered by frictional force and frictional heat to the predetermined region of the semiconductor as an electrode and part of the adhered metal or a metal of the alloy is diffused into an inside of the semiconductor by the frictional heat thereby to be formed into an ohmic electrode substantially simultaneously when the metal or alloy is adhered by the frictional force and frictional heat to the predetermined region of the semiconductor.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: November 9, 2004
    Assignee: Fuji Machine Mfg. Co., Ltd.
    Inventors: Kouichi Asai, Kazutoshi Sakai, Kazuya Suzuki, Hirofumi Koike, Shunji Yoshikane, Kenji Tanaka
  • Patent number: 6803490
    Abstract: A process for producing &agr;-phenylethyl alcohol, which comprises supplying a raw material containing acetophenone into a reactor and hydrogenating acetophenone in the presence of a hydrogenation catalyst, wherein the concentrations of organic acids and sulfur-containing acids in the raw material containing acetophenone are 1 &mgr;mol/g or less and 0.5 &mgr;mol/g or less, respectively.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: October 12, 2004
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Noriaki Oku, Hirofumi Koike
  • Publication number: 20040162449
    Abstract: A process for producing &agr;-phenylethyl alcohol, which comprises supplying a raw material containing acetophenone into a reactor and hydrogenating acetophenone in the presence of a hydrogenation catalyst, wherein the concentrations of organic acids and sulfur-containing acids in the raw material containing acetophenone are 1 &mgr;mol/g or less and 0.5 &mgr;mol/g or less, respectively.
    Type: Application
    Filed: January 11, 2001
    Publication date: August 19, 2004
    Inventors: Noriaki Oku, Hirofumi Koike
  • Publication number: 20040033683
    Abstract: An object of the present invention is to provide a technique for forming an ohmic connection between a semiconductor and a metal efficiently in a short period of time.
    Type: Application
    Filed: March 19, 2003
    Publication date: February 19, 2004
    Applicant: FUJI MACHINE MFG. CO., LTD.
    Inventors: Kouichi Asai, Kazutoshi Sakai, Kazuya Suzuki, Hirofumi Koike, Shunji Yoshikane, Kenji Tanaka
  • Patent number: 4856858
    Abstract: The present invention provides an optical scanner including a horizontally arranged base plate, a light source unit rigidly mounted on the base plate and adapted to emit a beam of light, an optical scanning unit for scanning the light beam in a repetitive cycle and an optical system unit for conducting the scanning beam to a desired surface to be irradiated, the optical scanning unit including a unit base, a torsion bar rigidly supported on the unit base at the opposite ends, a rotor rigidly mounted on the twistable portion of the torsion bar and having a mirror for reflecting the light beam, an electromagnetic drive mechanism for applying a rotational drive force to the rotor and a unit-side mirror for further reflecting the reflected light from the mirror, the optical scanning unit being arranged such that the torsion bar is disposed parallel to the base plate, the light beam being scanned along a plane perpendicular to the base plate on the rotation of the rotor and the reflected beam being scanned along a
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: August 15, 1989
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Hirofumi Koike, Yukio Endo, Tadashi Mitsuhashi