Patents by Inventor Katsumasa Kitsukawa

Katsumasa Kitsukawa 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).

  • Patent number: 4550329
    Abstract: A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR1## where each of R.sub.1 and R.sub.2 is hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: October 29, 1985
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Michihiro Gonda, Katsumasa Kitsukawa, Susumu Suzuka, Mikiko Kanasugi, Yutaka Sato, Kikuo Otomo
  • Patent number: 4539577
    Abstract: A heat sensitive record material comprising a support sheet and a heat sensitive record layer formed on the support sheet, the heat sensitive record layer being composed essentially of a colorless or light-colored electron-donating colorless dye, an acidic substance which is thermally reactive with the electron-donating colorless dye to develop a color and a binder, characterized in that said heat sensitive record layer contains an effective amount of at least one anilide compound represented by the general formula: ##STR1## where R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfamoyl group or a halogen atom; R.sub.3 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a halogen atom; and n is an integer of 0 to 5.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: September 3, 1985
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Kazuo Kaneko, Michihiro Gonda, Susumu Suzuka, Katsumasa Kitsukawa