Patents by Inventor Mitsutaka Seki

Mitsutaka Seki 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).

  • Purified chitins and production process thereof
    Patent number: 6989440
    Abstract: A purified chitin has a total content of fatty acids and salts thereof not higher than 0.2 wt. % in terms of fatty acids. The purified chitin can be produced by washing a chitin with at least one solvent selected from the group consisting of organic solvent and water-containing organic solvents such that a total content of fatty acids and salts thereof is lowered at least to 0.2 wt. % in terms of fatty acids.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: January 24, 2006
    Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Takanori Sannan, Shinya Tsuchida, Satoru Yoshinaga, Kazushige Ieda, Mitsutaka Seki
  • Purified chitins and production process thereof
    Publication number: 20030045692
    Abstract: A purified chitin has a total content of fatty acids and salts thereof not higher than 0.2 wt. % in terms of fatty acids. The purified chitin can be produced by washing a chitin with at least one solvent selected from the group consisting of organic solvent and water-containing organic solvents such that a total content of fatty acids and salts thereof is lowered at least to 0.2 wt. % in terms of fatty acids.
    Type: Application
    Filed: March 28, 2002
    Publication date: March 6, 2003
    Applicant: Dainichiseika Color & Chemical Mfg. Co., Ltd.
    Inventors: Takanori Sannan, Shinya Tsuchida, Satoru Yoshinaga, Kazushige Ieda, Mitsutaka Seki
  • Seed colorant
    Patent number: 4881343
    Abstract: A seed colorant useful especially in coloring seeds to distinguish same from those to be used for foods is formed of an aqueous medium such as water, a dye and/or pigment of a desired hue, and a binder resin composed of the salt of chitosan and an organic acid. The seed colorant may additionally contain spherical resin particles.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: November 21, 1989
    Assignee: Dainichiseika Color & Chemicals Mfg. Co. Ltd.
    Inventors: Takanori Sannan, Mitsutaka Seki, Shinya Tsuchida, Shojiro Horiguchi
  • Seed colorant
    Patent number: 4853429
    Abstract: A seed colorant useful especially in coloring seeds to distinguish same from those to be used for foods is formed of an aqueous medium such as water, a dye and/or pigment of a desired hue, and a binder resin composed of the salt of chitosan and an organic acid. The seed colorant may additionally contain spherical resin particles.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: August 1, 1989
    Assignee: Dainichiseika Color & Chemicals Mfg. Co. Ltd.
    Inventors: Takanori Sannan, Mitsutaka Seki, Shinya Tsuchida, Shojiro Horiguchi