Patents by Inventor Tadashi Niimi

Tadashi Niimi 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 and apparatus for treating and purifying waste water
    Patent number: 4218318
    Abstract: Waste water can be advantageously purified, removing environmental pollution such as offensive odor and pathogens, by making the best use of processes in which in a continuous way the fluid fluctuates repeatedly in fluid-gas flow in a tank, in addition to maximum utilization of activities of useful soil organisms.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: August 19, 1980
    Assignees: Tadashi Niimi, Masaaki Niimi
    Inventors: Tadashi Niimi, Masanori Niimi, Tsutomu Arimizu