Patents by Inventor Zen Mitsui

Zen Mitsui 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 removing antigenicity from peptide
    Patent number: 4307013
    Abstract: A method for removing antigenicity from peptide derived from a collagen-containing material or gelatin by hydrolyzing it with aid of an inorganic acid is disclosed. The method is carried out by passing the peptide through a mixture of a cation-exchange resin and an anion-exchange resin. The thus treated peptide may be further passed through a membrane for ultrafiltration to remove pyrogenous substances completely. The peptide obtained is useful as an additive, diluent or carrier for cosmetic articles or drugs.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: December 22, 1981
    Assignee: Nippi, Incorporated
    Inventors: Kazumasa Ohtsuka, Michihiko Takahashi, Masako Araki, Zen Mitsui
  • Peptide mixtures derived from collagenous material or gelatin
    Patent number: 4130555
    Abstract: Peptide mixtures having relatively narrow average molecular weights and characteristic amino acid compositions and a process for preparing the same from a collagenous material or gelatin are disclosed. The peptide mixtures have unique properties and are useful as a water- or moisture-retaining agent for cosmetic articles or foods, a foaming agent for foods, a bitterness-blocking agent for medicines or a nutritional component for soft drinks.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: December 19, 1978
    Assignee: Nippi Incorporated
    Inventors: Kazumasa Ohtsuka, Zen Mitsui, Hajime Wada