Patents by Inventor Sotoo Kubo

Sotoo Kubo 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).

  • Patent number: 5624550
    Abstract: Sludge which is supplied from an untreated sludge tank 3 and diluting water from a diluting water supply facility 14 is charged into a continuous kneading mixer 12 for diluting the sludge to make the specific weight of the sludge 1.15 to 1.35. The diluted sludge is supplied to a dehydrating machine 25 in accordance with the capacity of the used dehydrating machine 25. The diluted sludge is firstly added with an inorganic flocculating agent G and is mixed in a first blender 24A and is then added with a high molecular flocculating agent G2 and is mixed in a second blender 24B. Thereafter, the sludge is supplied to a belt press dehydrating machine 25 in which it is subjected to a dehydrating treatment.
    Type: Grant
    Filed: August 10, 1995
    Date of Patent: April 29, 1997
    Assignees: Chemical Grouting Co., Ltd., Front Engineering Co., Ltd., Kurita Water Industries Ltd., Shoeisangyo Corporation
    Inventors: Masahiro Iji, Masami Yoda, Shin Suzuki, Kaoru Ishizuka, Sotoo Kubo, Isao Yamaki, Toshikuni Hashimoto
  • Patent number: 5462672
    Abstract: Sludge which is supplied from an untreated sludge tank 3 and diluting water from a diluting water supply facility 14 is charged into a continuous kneading mixer 12 for diluting the sludge to make the specific weight of the sludge 1.15 to 1.35. The diluted sludge is supplied to a dehydrating machine 25 in accordance with the capacity of the used dehydrating machine 25. The diluted sludge is firstly added with an inorganic flocculating agent G and is mixed in a first blender 24A and is then added with a high molecular flocculating agent G2 and is mixed in a second blender 24B. Thereafter, the sludge is supplied to a belt press dehydrating machine 25 in which it is subjected to a dehydrating treatment.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: October 31, 1995
    Assignees: Chemical Grouting Co., Ltd., Front Engineering Co. Ltd., Kurita Water Industries Ltd., Shoesangyo Corporation
    Inventors: Masahiro Iji, Masami Yoda, Shin Suzuki, Kaoru Ishizuka, Sotoo Kubo, Isao Yamaki, Toshikuni Hashimoto
  • Patent number: 4209398
    Abstract: A water treating agent which comprises a specific polymer containing a structural unit that is derived from a monomer having an ethylenically unsaturated bond and has one or more carboxyl radicals, at least a part of said carboxyl radicals being modified, or another water treating agent which comprises, in addition to said specific polymer, one or more compounds selected from the group consisting of inorganic phosphates, phosphonic acids, organic phosphoric acid esters and polyvalent metal salts, is capable of preventing the formation of corrosion, scale and contamination on the surface of a metal that is in contact with water.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: June 24, 1980
    Assignees: Kurita Water Industries Ltd., Sanyo Chemical Industries, Ltd.
    Inventors: Motohiko Ii, Yoshio Goto, Takashi Suzuki, Sotoo Kubo