Patents by Inventor Naomichi Umehara

Naomichi Umehara 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).

  • Method for manufacturing rechargeable battery
    Patent number: 11929481
    Abstract: A method for manufacturing a rechargeable battery includes forming a mixture layer and an insulating layer on an electrode substrate having an edge extending in a specified direction so that an exposed portion where the electrode substrate is exposed extends between the edge and the insulating layer; pressing the mixture layer; and stretching an extension portion, located between the edge and the mixture layer, and the insulating layer in the specified direction. The stretching includes applying a stress greater than or equal to yield stress of the electrode substrate or greater than or equal to 0.2% proof stress of the electrode substrate and less than tensile strength of the electrode substrate to the extension portion, and applying a stress greater than or equal to yield stress of the insulating layer or greater than or equal to 0.2% proof stress of the insulating layer to the insulating layer.
    Type: Grant
    Filed: November 30, 2022
    Date of Patent: March 12, 2024
    Assignees: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Masakazu Umehara, Naomichi Ishikawa, Naoto Ooshiro, Yuuki Kudou, Hideki Hayashi, Hiroki Yamada, Naoya Kishimoto
  • Method for preparing sintered product, sintered product and magnetostriction material
    Patent number: 7470334
    Abstract: A method for manufacturing a sintered compact includes the steps of preparing an alloy powder having a composition represented by Expression 1: RTW (where, R is at least one kind of rare earth metal, T is at least one kind of transition metal, and w defines a relation of 1<w<4), sintering the alloy powder in a vacuum atmosphere or an atmosphere containing gas with a molecular weight of 30 or less, and processing the alloy powder by a hot isostatic pressing. The sintered compact has a high density, and reduces deteriorations in its sintered compact properties such as magnetostrictive properties in an air atmosphere at high-temperatures.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: December 30, 2008
    Assignee: TDK Corporation
    Inventors: Teruo Mori, Takeshi Nomura, Seigo Tokoro, Naomichi Umehara
  • Method for preparing sintered product, sintered product and magnetostriction material
    Publication number: 20030190250
    Abstract: A method for manufacturing a sintered compact includes the steps of preparing an alloy powder having a composition represented by Expression 1: RTW (where, R is at least one kind of rare earth metal, T is at least one kind of transition metal, and w defines a relation of 1<w<4), sintering the alloy powder in a vacuum atmosphere or an atmosphere containing gas with a molecular weight of 30 or less, and processing the alloy powder by a hot isostatic pressing. The sintered compact has a high density, and reduces deteriorations in its sintered compact properties such as magnetostrictive properties in an air atmosphere at high-temperatures.
    Type: Application
    Filed: February 27, 2003
    Publication date: October 9, 2003
    Inventors: Teruo Mori, Takeshi Nomura, Seigo Tokoro, Naomichi Umehara