Patents by Inventor Yoji Hirai

Yoji Hirai 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: 20230025703
    Abstract: A foam-molded product including a foam layer, and a skin layer covering the foam layer, in which the maximum diameter of bubbles in the foam layer is 0.90 mm or less; and a method for manufacturing a foam-molded product and a method for suppressing an appearance defect of a foam-molded product, including an injection process and a foaming process, wherein the foam-molded product after molding includes a foam layer and a skin layer covering the foam layer, the skin layer having an average thickness of from 0.3 mm to 0.7 mm, and wherein expanding of the volume of the cavity includes performing a core-back process of the mold such that a thickness of the foam-molded product after molding is within ±0.2 mm of a predetermined target thickness.
    Type: Application
    Filed: October 6, 2020
    Publication date: January 26, 2023
    Applicant: SHOWA DENKO MATERIALS CO., LTD.
    Inventors: Naoko MITSUISHI, Shingo NAKANO, Kouji YAMADA, Hiroaki FUJINO, Hirofumi SHIOKAWA, Yoji HIRAI
  • Publication number: 20230025993
    Abstract: An injection molded product includes a main body portion having a design surface and an opposite surface; and a projecting portion provided at a peripheral edge portion of the main body portion, and projecting out toward a side opposite from the design surface in a thickness direction of the main body portion, wherein a thickness A of the main body portion and a thickness B of the projecting portion satisfy a relationship of A?B.
    Type: Application
    Filed: October 7, 2020
    Publication date: January 26, 2023
    Applicant: SHOWA DENKO MATERIALS CO., LTD.
    Inventors: Takeshi FUNATSU, Shingo NAKANO, Naoko MITSUISHI, Kouji YAMADA, Hiroaki FUJINO, Hirofumi SHIOKAWA, Yoji HIRAI
  • Publication number: 20220402445
    Abstract: A molded body, comprising a resin and cells, the cells having an average diameter of from 0.03 mm to 0.13 mm, and a number per unit area of the cells at a cross-section of the molded body being no less than 20 cells/mm2.
    Type: Application
    Filed: October 15, 2020
    Publication date: December 22, 2022
    Applicant: SHOWA DENKO MATERIALS CO., LTD.
    Inventors: Hirofumi SHIOKAWA, Hiroaki FUJINO, Yoji HIRAI
  • Publication number: 20220339833
    Abstract: A resin molded article includes: a main body portion having a design face and an opposite face thereto, and having a first foamed layer formed inside the main body portion; a protruding portion that is provided at an edge portion of the main body portion, and that protrudes toward a side opposite from the design face in a thickness direction of the main body portion; and a concavity that is recessed from a surface of the opposite face toward a thickness direction side of the main body portion at a root portion of the protruding portion at the opposite face.
    Type: Application
    Filed: October 7, 2020
    Publication date: October 27, 2022
    Applicant: SHOWA DENKO MATERIALS CO., LTD.
    Inventors: Kouji YAMADA, Shingo NAKANO, Naoko MITSUISHI, Seigo MORISHITA, Hiroyuki ANDO, Yoji HIRAI
  • Patent number: 5755952
    Abstract: The method is practiced such that the material is alternately repeatedly placed in low temperature and high temperature active gas atmospheres, the material is subjected to low temperature contraction and high temperature expansion due to the endothermic reaction of active gas, and a part of the active gas adhesively adsorbed to the material during low temperature contraction is detached from the material due to high temperature expansion.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: May 26, 1998
    Assignee: Heiyo Shoji Kabushiki Kaisha
    Inventor: Yoji Hirai
  • Patent number: 5287383
    Abstract: An apparatus for producing an active carbon using a carbon-containing material inclusive of an used active carbon as a raw material wherein the carbon-containing raw material is carbonized in a carbonizing unit to produce a carbonized material having electric conductivity and the carbonized material is then activated in an activating treatment unit installed downstream of the carbonizing unit in an atmosphere of steam with a power of electricity induced by electric discharge as well as a function of self-heating of the carbonized material with its own electric resistance are disclosed. The carbonizing unit is constructed in the form of a thermal radiation type batch furnace including an outer wall and a vessel mounted on a firing lattice in the outer wall while a heating chamber is formed therebetween.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: February 15, 1994
    Assignee: Heiyo Shoji Kabushiki Kaisha
    Inventor: Yoji Hirai
  • Patent number: 5190901
    Abstract: A method and an apparatus for producing an active carbon using a carbon-containing material inclusive of an used active carbon as a raw material wherein the carbon-containing raw material is carbonized in a carbonizing unit to produce a carbonized material having electric conductivity and the carbonized material is then activated in an activating treatment unit installed downstream of the carbonizing unit in an atmosphere of steam with a power of electricity induced by electric discharge as well as a function of self-heating of the carbonized material with its own electric resistance are disclosed. The carbonizing unit is constructed in the form of a thermal radiation type batch furnace including an outer wall and a vessel mounted on a firing lattice in the outer wall while a heating chamber is formed therebetween.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: March 2, 1993
    Assignee: Heiyo Shoji Kabushiki Kaisha
    Inventor: Yoji Hirai