Patents by Inventor Seiji Toyoshi

Seiji Toyoshi 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 preventing fouling of electrodialysis membrane
    Patent number: 4711722
    Abstract: A method for preventing fouling of an electrodialysis membrane when conducting desalting of an inorganic salt-containing aqueous solution containing electrodialysis membrane-fouling substances, which is characterized by adjusting the pH of the solution to the isoelectric points of the fouling substances.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: December 8, 1987
    Assignee: Ajinomoto Co., Inc.
    Inventors: Seiji Toyoshi, Tomoya Yoshizumi, Masaru Saeki, Tetsuya Kawakita
  • Ultrafiltration method
    Patent number: 4523999
    Abstract: A method for removing impurities including humic substances, gums, polysaccharides, proteins or a mixture thereof from an amino acid fermented liquor obtained from cane, beet molasses, or a mixture thereof, said amino acid being selected from the group consisting of glutamic acid, lysine, and a mixture thereof; said method comprising:(a) adjusting the pH of the fermented liquor to a value of from 2-5 to precipitate said impurities, said impurities having an isoelectric point falling within a pH range of 2-5;(b) ultrafiltering said impurities from said fermented liquor using a semipermeable ultrafiltration membrane.
    Type: Grant
    Filed: December 16, 1983
    Date of Patent: June 18, 1985
    Assignee: Ajinomoto Co., Inc.
    Inventors: Seiji Toyoshi, Tetsuo Tanegawa, Masaru Saeki, Tetsuya Kawakita