Patents by Inventor Tasuku ASAI

Tasuku ASAI 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).

  • Separator for lead acid storage batteries, and lead acid storage battery
    Patent number: 11349175
    Abstract: A separator 100 is disposed between a positive electrode and a negative electrode in a lead acid storage battery including the positive electrode and the negative electrode, in which the separator 100 contains a glass fiber and an organic binder, the separator 100 includes a first layer 110a that is in contact with the positive electrode, and a second layer 110b that is in contact with the negative electrode, an average pore diameter of the first layer 110a is larger than an average pore diameter of the second layer 110b, and a thickness of the first layer 110a is equal to or less than the half of the overall thickness of the separator 100.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: May 31, 2022
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Akihito Gotoh, Tasuku Asai, Hiroshi Kakuno
  • SEPARATOR FOR LEAD ACID STORAGE BATTERIES, AND LEAD ACID STORAGE BATTERY
    Publication number: 20210151831
    Abstract: A separator 100 is disposed between a positive electrode and a negative electrode in a lead acid storage battery including the positive electrode and the negative electrode, in which the separator 100 contains a glass fiber and an organic binder, the separator 100 includes a first layer 110a that is in contact with the positive electrode, and a second layer 110b that is in contact with the negative electrode, an average pore diameter of the first layer 110a is larger than an average pore diameter of the second layer 110b, and a thickness of the first layer 110a is equal to or less than the half of the overall thickness of the separator 100.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 20, 2021
    Inventors: Akihito GOTOH, Tasuku ASAI, Hiroshi KAKUNO