Patents by Inventor Hirofumi Umetani

Hirofumi Umetani 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).

  • Storage battery
    Patent number: 8980467
    Abstract: There is provided a storage battery, including: a container having at least one cell chamber; a lid body (2) made of synthetic resin for covering a top opening of the container, the lid body having on a top surface a recessed portion that is recessed downward, the lid body having positive and negative electrode terminals disposed close to one side of the lid body and respectively at both end portions of said one side in a longitudinal direction, wherein the positive and negative electrode terminals (4) respectively have lower portions embedded in the lid body and upper portions projecting from the lid body; and an auxiliary lid (9) for closing the recessed portion.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: March 17, 2015
    Assignee: GS Yuasa International, Ltd.
    Inventors: Yasuhide Nakayama, Eiji Hojo, Hirofumi Umetani, Masashi Shiota, Shin Ohsaki, Shinichi Egami
  • STORAGE BATTERY
    Publication number: 20110039153
    Abstract: There is provided a storage battery, including: a container having at least one cell chamber; a lid body (2) made of synthetic resin for covering a top opening of the container, the lid body having on a top surface a recessed portion that is recessed downward, the lid body having positive and negative electrode terminals disposed close to one side of the lid body and respectively at both end portions of said one side in a longitudinal direction, wherein the positive and negative electrode terminals (4) respectively have lower portions embedded in the lid body and upper portions projecting from the lid body; and an auxiliary lid (9) for closing the recessed portion.
    Type: Application
    Filed: April 24, 2009
    Publication date: February 17, 2011
    Inventors: Yasuhide Nakayama, Eiji Hojo, Hirofumi Umetani, Masashi Shiota, Shin Ohsaki, Shinichi Egami
  • Negative active material, method of manufacturing its material, and lead acid battery
    Patent number: 7022433
    Abstract: A negative active material is characterized by being prepared by adding a lignin having a unit structure represented by the formula (I) as the main structure to a lead oxide. Since the lignin of the formula (I) is added, the negative active material can be prevented from shrinkage due to charge/discharge. (wherein R1 is H, OH, COOH, SO3H, SH, C6H5, COO?, SO3?, R2C6H4, (R2)2C6H3, or (R2)3C6H2; and R2 is at least one member selected from among OH, COOR, SO3H, and CH2SO3H.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: April 4, 2006
    Assignee: GS Yuasa Corporation
    Inventors: Hirofumi Umetani, Ikumi Ban, Yoshihiro Eguchi
  • Negative active material, method of manufacturing its material, and lead acid battery
    Publication number: 20040053130
    Abstract: A negative active material is characterized by being prepared by adding a lignin having a unit structure represented by the formula (I) as the main structure to a lead oxide. Since the lignin of the formula (I) is added, the negative active material can be prevented from shrinkage due to charge/discharge.
    Type: Application
    Filed: March 24, 2003
    Publication date: March 18, 2004
    Inventors: Hirofumi Umetani, ikumi Ban, Yoshihiro Eguchi