Patents by Inventor Akio Kashiwagi

Akio Kashiwagi 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).

  • Heating system for conveyor pipes
    Patent number: 5368063
    Abstract: A long heating pipe is laid along a conveyor pipe and in contact with the outer surface thereof. The heating pipe is provided with an outer tube which has an operating fluid hermetically contained therein, and a steam tube which is inserted through the outer tube. A container is provided to accumulate condensation created as a result of the liquefaction of vapor fed through the steam tube of the heating pipe. This container has a temperature sensing valve located therein. The temperature sensing valve is closed if the condensation within the container more rises in temperature than predetermined, and this valve is opened if the condensation within the container more decreases in temperature than predetermined. This temperature sensing valve is communicatively connected to the downstream side end portion of the steam tube of the heating pipe, which is inserted into the container.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: November 29, 1994
    Assignees: Osaka Gas Co., Ltd., Miyawaki Incorporated, Mitsubishi Cable Industries, Ltd.
    Inventors: Masahiro Kida, Akio Kashiwagi, Junji Nakanishi, Tominori Sato, Masahiko Ohmura, Masahiro Nakamoto, Masakazu Maruoka, Mashashi Takata
  • Chromogenic fluoran derivatives
    Patent number: 4677203
    Abstract: Certain 3-piperidino fluoran derivatives useful as color recording materials are disclosed.
    Type: Grant
    Filed: June 14, 1983
    Date of Patent: June 30, 1987
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Masakichi Yahagi, Shoichi Horiuchi, Takahumi Toyama, Akio Kashiwagi, Teruo Suzuki, Tetsuo Igaki, Kazuyuki Horisawa, Mituhiro Shoji
  • Chromogenic fluoran derivatives and the preparation and use thereof
    Patent number: 4410708
    Abstract: Certain 3-substituted amino-7-substituted fluoran derivatives useful as color recording materials.
    Type: Grant
    Filed: February 3, 1976
    Date of Patent: October 18, 1983
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Masakichi Yahagi, Shoichi Horiuchi, Takahumi Toyama, Akio Kashiwagi, Teruo Suzuki, Tetsuo Igaki, Kazuyuki Horisawa, Mituhiro Shoji
  • Chromogenic fluoran derivatives and the preparation and use thereof
    Patent number: 3959571
    Abstract: A recording material which is suitable as a pressure-sensitive or heat-sensitive copying paper or recording paper by developing a color in contact with an electron-accepting material which comprises certain fluoran derivatives containing piperidino, pyrrolidino, morpholino and cycohexylamino groups.
    Type: Grant
    Filed: May 21, 1974
    Date of Patent: May 25, 1976
    Assignee: Shin Nisso Kako Co., Ltd.
    Inventors: Masakichi Yahagi, Shoichi Horiuchi, Takahumi Toyama, Akio Kashiwagi, Teruo Suzuki, Tetsuo Igaki, Kazuyuki Horisawa, Mituhiro Shoji