Patents by Inventor Yutaka Dote

Yutaka Dote 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).

  • Method of removing nitrogen impurities from water using hydrocarbon-producing microalga
    Patent number: 5476787
    Abstract: Water containing an inorganic nitrogen-containing compound, such as water effluent from sewage treatment plant, is treated for the removal of the nitrogen-containing compound and for the production of hydrocarbons by proliferating microalga capable of consuming the nitrogen-containing compound and of producing the hydrocarbons as an intracellular product. After adjusting the water content, the resulting culture containing the proliferated microalga and clean water is heated at a high temperature and a high pressure to liberate the hydrocarbon from the microalga. The hydrocarbon is subsequently recovered by solvent extraction.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: December 19, 1995
    Assignee: Director-General of Agency of Industrial Science and Technology
    Inventors: Shinya Yokoyama, Shigeki Sawayama, Tomoaki Minowa, Yutaka Dote