Patents by Inventor Yoh-ichi Koyama

Yoh-ichi Koyama 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).

  • Collagen peptide composition production method, DPP-4 inhibitor, and antihyperglycemic agent
    Patent number: 9486491
    Abstract: Provided are methods of producing a novel collagen peptide composition, and a DPP-4 inhibitor and antihyperglycemics that comprise the above-mentioned collagen peptide composition. Ginger rhizome-derived enzymes are added to and break down a collagen and/or gelatin solution to generate peptide compositions comprising peptides represented by X-Hyp-Gly (wherein X represents an amino acid residue other than Gly, Hyp, and Pro). The thus obtained collagen peptide composition has a high DPP-4 inhibitory activity and an excellent antihyperglycemic effect.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: November 8, 2016
    Assignee: Nippi, Incorporated
    Inventors: Yuki Taga, Masashi Kusubata, Satoshi Suzuki, Osamu Hayashida, Yoh-ichi Koyama, Shunji Hattori
  • Collagen Peptide Composition Production Method, DPP-4 Inhibitor, and Antihyperglycemic Agent
    Publication number: 20150182580
    Abstract: Provided are methods of producing a novel collagen peptide composition, and a DPP-4 inhibitor and antihyperglycemics that comprise the above-mentioned collagen peptide composition. Ginger rhizome-derived enzymes are added to and break down a collagen and/or gelatin solution to generate peptide compositions comprising peptides represented by X-Hyp-Gly (wherein X represents an amino acid residue other than Gly, Hyp, and Pro). The thus obtained collagen peptide composition has a high DPP-4 inhibitory activity and an excellent antihyperglycemic effect.
    Type: Application
    Filed: July 23, 2013
    Publication date: July 2, 2015
    Applicant: Nippi, Incorporated
    Inventors: Yuki Taga, Masashi Kusubata, Satoshi Suzuki, Osamu Hayashida, Yoh-ichi Koyama, Shunji Hattori
  • Type I-type IV collagen hybrid gel
    Patent number: 8691951
    Abstract: It is an object of the present invention to provide a Type I-Type IV collagen hybrid gel, which maintains characteristics of a Type IV collagen and is superior in gel strength. It is the Type I-Type IV collagen hybrid gel obtained by mixing 100 to 500 parts by mass of the Type I collagen having fibrosis ability, relative to 100 parts by mass of the Type IV collagen having gelling ability. A three-dimensional structure is formed, where a membrane-like substance by the Type IV collagen is formed onto a fibrous substance by the Type I collagen, so as to be able to provide cell culture environment approximate to a basement membrane of a living body.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: April 8, 2014
    Assignees: Japan Institute of Leather Research, Osaka University
    Inventors: Shunji Hattori, Yoh-ichi Koyama, Hitomi Fujisaki, Kiyotoshi Sekiguchi, Sugiko Futaki, Ryoko Sato
  • TYPE I-TYPE IV COLLAGEN HYBRID GEL
    Publication number: 20120208761
    Abstract: It is an object of the present invention to provide a Type I-Type IV collagen hybrid gel, which maintains characteristics of a Type IV collagen and is superior in gel strength. It is the Type I-Type IV collagen hybrid gel obtained by mixing 100 to 500 parts by mass of the Type I collagen having fibrosis ability, relative to 100 parts by mass of the Type IV collagen having gelling ability. A three-dimensional structure is formed, where a membrane-like substance by the Type IV collagen is formed onto a fibrous substance by the Type I collagen, so as to be able to provide cell culture environment approximate to a basement membrane of a living body.
    Type: Application
    Filed: February 14, 2011
    Publication date: August 16, 2012
    Inventors: Shunji Hattori, Yoh-ichi Koyama, Hitomi Fujisaki, Kiyotoshi Sekiguchi, Sugiko Futaki, Ryoko Sato
  • Method of treating hairs or feathers using microorganisms
    Patent number: 6440692
    Abstract: Large amounts of hairs and feathers can be decomposed and refined by treatment in an oxygen-containing gas stream with a fungus that can decompose hairs and feathers. The resulting decomposed and refined hairs and feathers are useful as a fertilizer.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: August 27, 2002
    Assignee: Japan Institute of Leather Research
    Inventors: Yoh-ichi Koyama, Koki Suzuki, Koki Ogata, Masashi Kusubata, Shinkichi Irie