Patents by Inventor Yoshinari Fusaoka

Yoshinari Fusaoka 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).

  • Bactericide for use in water treatment, method for water treatment and apparatus for water treatment
    Patent number: 7090780
    Abstract: A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water treatment method and water treatment apparatus exhibiting a high sterilization effect in a membrane separation device for seawater desalination, etc.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: August 15, 2006
    Assignee: Toray Industries, Inc.
    Inventors: Akihiko Ito, Katsufumi Oto, Kazuya Sugita, Yoshinari Fusaoka
  • Water-treating microbicide, water treatment method and water treatment apparatus
    Publication number: 20060016754
    Abstract: A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water treatment method and water treatment apparatus exhibiting a high sterilization effect in a membrane separation device for seawater desalination, etc.
    Type: Application
    Filed: September 29, 2005
    Publication date: January 26, 2006
    Applicant: Toray industries, Inc. a corporation of Japan
    Inventors: Akihiko Ito, Katsufumi Oto, Kazuya Sugita, Yoshinari Fusaoka
  • Method of bacteriostasis or disinfection for permselective membrane
    Patent number: 6743363
    Abstract: In the invention, the pipe lines around permselective membranes and the surfaces of permselective membranes are intermittently disinfected by adding an inexpensive acid such as sulfuric acid or the like to pre-treated crude water so as to make the water have a pH of 4 or lower. Accordingly, the invention provides a method of surely disinfecting the permselective membranes in membrane separation systems.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: June 1, 2004
    Assignee: Toray Industries, Inc.
    Inventors: Takuhei Kimura, Yuichiro Nakaoki, Yohito Ito, Yoshinari Fusaoka, Toshihiro Miyoshi
  • Bactericide for use in water treatment, method for water treatment and apparatus for water treatment
    Publication number: 20040050800
    Abstract: A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water treatment method and water treatment apparatus exhibiting a high sterilization effect in a membrane separation device for seawater desalination, etc.
    Type: Application
    Filed: May 23, 2003
    Publication date: March 18, 2004
    Inventors: Akihiko Ito, Katsufumi Oto, Kazuya Sugita, Yoshinari Fusaoka
  • Process for producing composite semipermeable membrane
    Patent number: 6521130
    Abstract: When forming a separating functional layer containing crosslinked polyamide, by carrying this out in the presence of 1) carboxylic acid ester with a total of 8 or more carbons, or 2) carboxylic acid, it is possible to provide a composite semipermeable membrane which, while still maintaining a high rejection rate, is more outstanding in its water permeability than hitherto.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: February 18, 2003
    Assignee: Toray Industries, Inc.
    Inventors: Shunji Kono, Akihiko Ito, Yoshinari Fusaoka
  • Method for inhibiting growth of bacteria or sterilizing around separating membrane
    Patent number: 6468430
    Abstract: In the invention, the pipe lines around permselective membranes and the surfaces of permselective membranes are intermittently disinfected by adding an inexpensive acid such as sulfuric acid or the like to pre-treated crude water so as to make the water have a pH of 4 or lower. Accordingly, the invention provides a method of surely disinfecting the permselective membranes in membrane separation systems.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: October 22, 2002
    Assignee: Toray Industries, Inc.
    Inventors: Takuhei Kimura, Yuichiro Nakaoki, Yohito Ito, Yoshinari Fusaoka, Toshihiro Miyoshi
  • Composite semipermeable membrane, processfor producing the same, and method of purifying water with the same
    Patent number: 6406626
    Abstract: The present invention relates to a composite semipermeable membrane which is characterized in that it is a composite semipermeable membrane in which there is formed by polycondensation on top of a microporous support membrane a crosslinked polyamide ultra-thin membrane layer from polyfunctional amine, polyfunctional acid halide and polyfunctional acid anhydride halide, and the flow of water permeate at an operating pressure of 0.3 MPa, a temperature of 25° C. and a pH of 6.5 lies in the range from 0.8 to 4.0 m3/m2.day and, furthermore, the percentage humic acid removal is at least 98%; a method for the production thereof; and a water purification method employing same.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: June 18, 2002
    Assignee: Toray Industries, Inc.
    Inventors: Mutsuo Murakami, Yasushi Tateishi, Yoshinari Fusaoka