Patents by Inventor Yasuyuki Atarashi

Yasuyuki Atarashi 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).

  • Waste water treatment method
    Patent number: 4043904
    Abstract: A waste water treatment method for treating waste waters containing a surface active agent comprising a condensate obtained by condensing, with formaldehyde, a sulfonated organic compound such as an aromatic compound, a fused benzene ring compound or a hetero compound, in which a flocculation treatment is combined with an active carbon treatment.
    Type: Grant
    Filed: August 17, 1976
    Date of Patent: August 23, 1977
    Assignee: Kao Soap Co., Ltd.
    Inventors: Tsuneshi Takeda, Yasuyuki Atarashi, Akira Mori