Patents by Inventor Toru Kawachi

Toru Kawachi 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).

  • Apparatus for producing ultrapure water
    Patent number: 5385664
    Abstract: In an ultrapure water production apparatus formed of a source water pretreatment system, a primary pure water system, and a secondary pure water system, the source water pretreatment system includes a biological processing device.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: January 31, 1995
    Assignee: Kurita Water Industries Ltd.
    Inventors: Masayoshi Oinuma, Toru Kawachi
  • Method for the removal of nucleic acids and/or endotoxin
    Patent number: 4885168
    Abstract: Agent for the removal of nucleic acids and/or endotoxin from a liquid containing the nucleic acids and/or endotoxin and further useful substances (e.g. proteins, hormones, etc.), which comprises as an active ingredient a chitosan having a low molecular weight, particularly that having an intrinsic viscosity of 0.01 to 5 (dl/g) and further a colloid equivalent of not less than 2 meq/g of evaporated residue.
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: December 5, 1989
    Assignees: Dainippon Pharmaceutical Co., Ltd., Kurita Water Industries Ltd.
    Inventors: Masanori Hashimoto, Takeshi Yamamoto, Toru Kawachi, Junji Kuwashima, Hirokazu Kitaoka