Patents by Inventor Satoru Sampei

Satoru Sampei 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).

  • Reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording device, image processing apparatus, and image processing method
    Patent number: 7452847
    Abstract: A reversible thermosensitive recording medium including a substrate, and a thermosensitive layer including an electron donating coloring compound, an electron accepting compound, and a phenol anti-oxidation agent containing one or more sulfur atoms having an alkyl group on one side. In addition, the thermosensitive layer reversibly changes its color tone depending on temperature to reversibly record and erase an image thereon.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: November 18, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroki Kuboyama, Satoshi Arai, Tadafumi Tatewaki, Satoru Sampei
  • Reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording device, image processing apparatus, and image processing method
    Publication number: 20060094599
    Abstract: A reversible thermosensitive recording medium including a substrate, and a thermosensitive layer including an electron donating coloring compound, an electron accepting compound, and a phenol anti-oxidation agent containing one or more sulfur atoms having an alkyl group on one side. In addition, the thermosensitive layer reversibly changes its color tone depending on temperature to reversibly record and erase an image thereon.
    Type: Application
    Filed: November 1, 2005
    Publication date: May 4, 2006
    Inventors: Hiroki Kuboyama, Satoshi Arai, Tadafumi Tatewaki, Satoru Sampei
  • Reversible thermosensitive recording medium and image processing method using the same
    Patent number: 6770592
    Abstract: A reversible thermosensitive recording medium comprising at least a reversible thermosensitive recording layer provided on a supporting substrate and, a protective layer provided on the recording layer, wherein the recording layer is arranged so as to develop a first color therein when it is heated to a specific temperature level between a second temperature and a third temperature which is higher than the second temperature and then cooled to a first temperature level between normal temperature and the second temperature which is higher than the normal temperature, while so as to develop a second color therein when it is heated to another temperature level more than a fourth temperature which is higher than the third temperature and then cooled to a particular temperature which is lower than the first temperature, and the protective layer contains at least a lubricant showing the melting point ranging from higher than or equal to the first temperature to lower than or equal to the second temperature and has
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: August 3, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Yoshihiko Hotta, Kunichika Morohoshi, Nobuyoshi Sugiyama, Satoru Sampei
  • Reversible thermosensitive recording medium and image processing method using the same
    Publication number: 20030092571
    Abstract: A reversible thermosensitive recording medium comprising at least a reversible thermosensitive recording layer provided on a supporting substrate and, a protective layer provided on the recording layer, wherein the recording layer is arranged so as to develop a first color therein when it is heated to a specific temperature level between a second temperature and a third temperature which is higher than the second temperature and then cooled to a first temperature level between normal temperature and the second temperature which is higher than the normal temperature, while so as to develop a second color therein when it is heated to another temperature level more than a fourth temperature which is higher than the third temperature and then cooled to a particular temperature which is lower than the first temperature, and the protective layer contains at least a lubricant showing the melting point ranging from higher than or equal to the first temperature to lower than or equal to the second temperature and has
    Type: Application
    Filed: February 26, 2002
    Publication date: May 15, 2003
    Inventors: Kazumi Suzuki, Yoshihiko Hotta, Kunichika Morohoshi, Nobuyoshi Sugiyama, Satoru Sampei