Patents by Inventor Tutomu Kamihigoshi

Tutomu Kamihigoshi 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).

  • Active materials for batteries
    Patent number: 4684591
    Abstract: An active material for batteries or cells having improved discharge characteristics and comprising a fluorinated graphite produced by fluorination of graphite with fluorine, the fluorinated graphite containing substantially no unreacted graphite and having a degree of fluorination such that the weight or fluorine content thereof is increased by a further fluorination under conditions equal to or severer than the fluorination conditions adopted to the production of the fluorinated graphite. The use of artificial graphite having a Franklin's P-value of at least 0.45 as a starting material is effective for further improving the discharge voltage and the capacity.
    Type: Grant
    Filed: October 29, 1985
    Date of Patent: August 4, 1987
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Kazuo Okamura, Satoshi Koyama, Tadayuki Maeda, Tutomu Kamihigoshi