Patents by Inventor Kazuyuki Hatano

Kazuyuki Hatano 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 for treating waste water
    Patent number: 4917802
    Abstract: A method of treating raw water containing phosphorous and nitrogen compounds and organic matter in which the raw water is passed through an aerobic zone containing a porous material. Anaerobic treatment is carried out in the presence of a hydrogen donor. The porous material is tobermorite and/or xonotlite with a porosity of 50% to 90% and is produced by foaming and hardening a silica-based material, a lime-based material and water, and subjecting the porous material to hydrothermal synthesis. The order of the aerobic and anaerobic treatments may be varied.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: April 17, 1990
    Assignee: Onoda Autoclaved Light Weight Concrete Co., Ltd
    Inventors: Yukio Fukaya, Kazuyuki Hatano, Kazuhiro Sainohira