Patents by Inventor Yoichi Karita

Yoichi Karita 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).

  • Process for treatment of radioactive waste
    Patent number: 5744020
    Abstract: A process for treating a radioactive waste, includes drying a radioactive waste containing a radioactive substance(s) and a sodium compound(s), to convert it into a dried material, heating the dried material to convert it into a molten salt, and subjecting the molten salt to electrolysis using the salt as an anolyte and .beta.-alumina as a sodium ion-permeable membrane. This process can recover metallic sodium or sodium hydroxide, each of extremely low radioactivity from a radioactive waste containing a radioactive substance(s) and a sodium compound(s), at a high purity at a high current efficiency.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: April 28, 1998
    Assignees: Douryokuro Kakunenryo Kaihatsu Jigyoudan, NGK Insulators, Ltd.
    Inventors: Takao Akiyama, Yoichi Miyamoto, Shunji Inoue, Yoshihiko Kurashima, Yoichi Karita
  • Radioactive matter containing waste gas treating installation
    Patent number: 4050638
    Abstract: Maintenance apparatuses for and improvements in a radioactive matter containing waste gas treating installation, which is capable of completely carrying out waste gas cleaning by means of ceramic filter element is disclosed. The installation is provided with at least one of the following three apparatuses or devices, i.e.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: September 27, 1977
    Assignee: NGK Insulators, Ltd.
    Inventors: Isao Ito, Yoichi Karita