Patents by Inventor Morio Nanbu

Morio Nanbu 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).

  • Addition compound of fluoran compounds and ketone
    Patent number: 4695640
    Abstract: Addition compound of fluoran compound and ketone useful as color former for heat or pressure-sensitive color-developable recording material.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: September 22, 1987
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Masakichi Yahagi, Tetsuo Igaki, Shinji Yoshinaka, Kimiaki Kinoshita, Morikuni Saito, Toshiyuki Yamashita, Morio Nanbu
  • Fluoran compounds
    Patent number: 4687862
    Abstract: The fluoran compounds of the formula (I) are new red color forming chromogenic dyes. ##STR1## wherein R represents an isobutyl or isopentyl group, R.sub.1 represents a hydrogen or halogen atom or an alkyl group, R.sub.2 represents a hydrogen or halogen atom or an alkyl group, R.sub.3 represents a hydrogen atom, and R.sub.4 represents a hydrogen atom, or R.sub.4 and R.sub.1 as well as R.sub.2 and R.sub.3 taken together with the carbon atoms to which they are attached may form a benzene ring which may be substituted with a halogen atom. They are used, together with an acidic developer, in chromogenic recording materials for use in pressure sensitive copying paper, heat-sensitive recording paper and thermo-sensitive, reversible color changing composition.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: August 18, 1987
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Takeo Obitsu, Tetsuo Igaki, Kimiaki Kinoshita, Morio Nanbu, Shinichi Satoh
  • Chromogenic materials employing fluoran compounds
    Patent number: 4680598
    Abstract: The fluoran compounds of the formula (I) are new red color forming chromogenic dyes. ##STR1## wherein R represents an isobutyl or isopentyl group, R.sub.1 represents a hydrogen or halogen atom or an alkyl group, R.sub.2 represents a hydrogen or halogen atom or an alkyl group, R.sub.3 represents a hydrogen atom, and R.sub.4 represents a hydrogen atom, or R.sub.4 and R.sub.1 as well as R.sub.2 and R.sub.3 taken together with the carbon atoms to which they are attached may form a benzene ring which may be substituted with a halogen atom. They are used, together with an acidic developer, in chromogenic recording materials for use in pressure sensitive copying paper, heat-sensitive recording paper and thermo-sensitive, reversible color changing composition.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: July 14, 1987
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Takeo Obitsu, Tetsuo Igaki, Kimiaki Kinoshita, Morio Nanbu, Shinichi Satoh
  • Fluoran compound and color forming record materials using the same
    Patent number: 4668967
    Abstract: 3-N-isobutyl-ethylamino-7-phenylaminofluoran is a new green color former. It is used, together with an acidic substance, in color forming record materials for use in pressure sensitive copying paper, heat-sensitive recording paper and the like.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: May 26, 1987
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Masakichi Yahagi, Takeo Obitsu, Tetsuo Igaki, Kazuyuki Horisawa, Morio Nanbu, Kimiaki Kinoshita, Sumio Manaka