Patents by Inventor Ohkawara Masaaki

Ohkawara Masaaki 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).

  • Vacuum drying method
    Patent number: 5232550
    Abstract: A vacuum drying method and wherein a feed liquid is sprayed into a solvent vapor before being introduced into a vacuum chamber for vacuum evaporation, whereby a powder having spherical particles is produced. Moreover, the amount of solvent remaining in the powder obtained is small.
    Type: Grant
    Filed: September 26, 1991
    Date of Patent: August 3, 1993
    Assignee: Ohkawara Kakohki Co., Ltd.
    Inventors: Itoh Takashi, Ohkawara Masaaki