Patents by Inventor Seiji Tao

Seiji Tao 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 of manufacturing positive active material for batteries
    Patent number: 5928714
    Abstract: Heavy-load discharge characteristics of a primary battery are improved. Alternatively, the high-rate discharge characteristics of a secondary battery are improved. This is accomplished by employing manganese oxides as the positive active material on which a surface modified layer is formed. The surface modified layer consists of an oxide of at least one element selected from the group consisting of titanium, cobalt, nickel, strontium, lanthanum and its compound added mainly with a compound made of manganese oxide on the surface of manganese oxide powder consisting of manganese dioxide or a complex oxide of manganese and lithium. This is accomplished by using a solution of salt of at least one element selected from the group consisting of titanium, cobalt, nickel, strontium, and lanthanum to which a manganese salt and a solution, to which a solution of manganese salt are added.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: July 27, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Jun Nunome, Takuya Nakashima, Hiroshi Yoshizawa, Seiji Tao
  • Batteries and a method of manufacturing positive active material for the batteries
    Patent number: 5744266
    Abstract: Heavy-load discharge characteristics of a primary battery are improved. Alternatively, the high-rate discharge characteristics of a secondary battery are improved. This is accomplished by employing manganese oxides as the positive active material on which a surface modified layer is formed. The surface modified layer consists of an oxide of at least one element selected from the group consisting of titanium, cobalt, nickel, strontium, lanthanum and its compound added mainly with a compound made of manganese oxide on the surface of manganese oxide powder consisting of manganese dioxide or a complex oxide of manganese and lithium. This is accomplished by using a solution of salt of at least one element selected from the group consisting of titanium, cobalt, nickel, strontium, and lanthanum to which a manganese salt and a solution, to which a solution of manganese salt are added.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: April 28, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Jun Nunome, Takuya Nakashima, Hiroshi Yoshizawa, Seiji Tao