Patents by Inventor Shingo Tachizawa

Shingo Tachizawa 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 heat-sensitive recording material
    Patent number: 6004899
    Abstract: Disclosed is a reversible heat-sensitive recording material having a support and a reversible heat-sensitive recording layer provided at least one surface of the support and containing a colorless or slightly colored leuco dye and a reversible color developing agent capable of causing a reversible change in color density of the dye due to the difference in cooling rate after heating, which may further have a protective layer provided on the reversible heat-sensitive recording layer, and an anchor layer provided between the support and the reversible heat-sensitive recording layer, characterized in that at least one of the reversible heat-sensitive recording layer, the protective layer and the anchor layer contains a pigment subjected to a surface-modifying treatment.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: December 21, 1999
    Assignee: Mitsubishi Paper Mills Limited
    Inventor: Shingo Tachizawa
  • Carbonless copying paper
    Patent number: 5407892
    Abstract: The present invention is characterized by using an ampholytic latex as binder in a carbonless copying paper prepared by coating on a support a coating composition comprising a stilt agent, a binder and anionic microcapsules containing a color former and drying the composition. The present invention is further characterized by using an association forming polymer in a coating composition in a carbonless copying paper prepared by coating on a support a coating composition containing a stilt agent, a binder mainly composed of a latex and microcapsules containing a color former and drying the coating composition. The present invention is further characterized by using an association forming polymer in a coating composition without using a stilt agent in a carbonless pressure-sensitive copying paper prepared by coating a coating composition comprising a latex and microcapsules containing a color former and drying the composition.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: April 18, 1995
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Yoshihide Murakami, Shingo Tachizawa, Takeo Sugiyama
  • Carbonless copying paper
    Patent number: 5288687
    Abstract: The present invention is characterized by using an ampholytic latex as binder in a carbonless copying paper prepared by coating on a support a coating composition comprising a stilt agent, a binder and anionic microcapsules containing a color former and drying the composition. The present invention is further characterized by using an association forming polymer in a coating composition in a carbonless copying paper prepared by coating on a support a coating composition containing a stilt agent, a binder mainly composed of a latex and microcapsules containing a color former and drying the coating composition. The present invention is further characterized by using an association forming polymer in a coating composition without using a stilt agent in a carbonless pressure-sensitive copying paper prepared by coating a coating composition comprising a latex and microcapsules containing a color former and drying the composition.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: February 22, 1994
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Yoshihide Murakami, Shingo Tachizawa, Takeo Sugiyama
  • Desensitizer composition
    Patent number: 4927971
    Abstract: There is disclosed a desensitizing ink comprising an adduct produced by the addition of 4 to 70 mols of an alkylene oxide to 1 mol of an amine represented by the general formula (I) where 40 mol % or more of said alkylene oxide are butylene oxide: ##STR1##
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: May 22, 1990
    Assignee: Mitsubishi Paper Mills Ltd.
    Inventors: Mitsuru Fuchigami, Shingo Tachizawa, Mamoru Ishiguro