Patents by Inventor Sunao Harada

Sunao Harada 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).

  • Secondary battery utilizing a mixed binder
    Patent number: 5380606
    Abstract: A secondary battery has a positive electrode principally comprising a lithium-containing complex oxide, a negative electrode principally comprising a carbon material and an organic electrolyte solution, said negative electrode utilizing a mixed binder comprising a polyamic acid and at least one polymer selected from the group consisting of a polyamide resin, polyvinylpyrrolidone and a hydroxyalkylcellulose. The battery has a long cycle life and, at the same time, hardly breaks or bursts even when the battery temperature becomes abnormally high, thereby being highly reliable.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: January 10, 1995
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tsukasa Itou, Kazuo Teraji, Noriyuki Yoshinaga, Sunao Harada, Kouji Negoro, Kazunari Mori