Patents by Inventor Yasunori Hiwatashi

Yasunori Hiwatashi 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).

  • Ultrasonic vibration sieving apparatus and process for purifying carbon black by using the apparatus
    Patent number: 4693879
    Abstract: A process for purifying carbon black which contains solid impurities by removing the solid impurities thererom, which process comprises suspending said carbon black uniformly in water to obtain a carbon black aqueous slurry and subjecting the slurry to sieving treatment by an ultrasonic vibration sieving apparatus.
    Type: Grant
    Filed: October 9, 1985
    Date of Patent: September 15, 1987
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Shushichi Yoshimura, Yasunori Hiwatashi, Hiromu Kobayashi, Hozo Yamazaki, Nobu Nishino, Teruji Tahara, Hidenobu Kobayashi