Patents by Inventor Nobuo Katagiri

Nobuo Katagiri 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).

  • Negative electrode for lithium secondary battery and lithium secondary battery using the negative electrode
    Patent number: 5900336
    Abstract: A negative electrode for a lithium secondary battery includes at least two kinds of carbon materials with a spacing of lattice plane (d.sub.002) of 3.4 .ANG. or less in the direction of the C axis thereof. A lithium secondary battery using this negative electrode is provided.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: May 4, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiyuki Kabata, Yoshiko Kurosawa, Toshiyuki Ohsawa, Nobuo Katagiri, Okitoshi Kimura, Toshishige Fujii, Yoshitaka Hayashi, Hiroyuki Iechi, Yumiko Suzuki, Tomohiro Inoue
  • Non-aqueous secondary lithium battery
    Patent number: 5885733
    Abstract: A non-aqueous secondary lithium battery includes a positive electrode; a negative electrode which including at least one component selected from the group consisting of lithium, a lithium alloy, and a host compound which forms an intercalation compound or complex in combination with lithium; and an electrolytic solution or solid electrolyte containing a silicone compound.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: March 23, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiyuki Ohsawa, Toshiyuki Kabata, Yoshiko Kurosawa, Okitoshi Kimura, Toshishige Fujii, Nobuo Katagiri, Yoshitaka Hayashi
  • Positive electrode and secondary battery using the same
    Patent number: 5437943
    Abstract: A positive electrode is composed of a film-shaped active material, which is composed of a conducting polymer serving as a first active material, and an electrochemical active material serving as a second active material which is uniformly dispersed in the shape of particles in the conducting polymer, with the parts-by-weight ratio of the second active material to the first active material being 3 to 9 parts of the second active material to 7 to 1 part of the first active material, when the total of the first active material and the second active material is 10 parts. A secondary battery is fabricated using the above positive electrode.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: August 1, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshishige Fujii, Okitoshi Kimura, Toshiyuki Ohsawa, Toshiyuki Kabata, Nobuo Katagiri