Patents by Inventor Tetsuya Sayo

Tetsuya Sayo 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).

  • N-ACETYGLUCOSAMINE DERIVATIVES AND USE THEREOF
    Publication number: 20080293673
    Abstract: The present invention relates to An N-acetylglucosamine derivative represented by the following formula (1), and a hyaluronic acid production promoting agent containing the same and a skin external preparation containing the same: wherein R1 is a hydrogen atom or an alkyl group having 2 to 18 carbon atoms; R2, R3, and R4 are hydrogen atoms or acyl groups having 2 to 18 carbon atoms and may be all the same or different from others; the steric structure at position 1 may be ? or ?; provided that R1, R2, R3, and R4 must not be all hydrogen atoms. It is intended to provide an easily available hyaluronic acid production promoting agent and a skin external preparation whereby the production of hyaluronic acid can be promoted in the skin and thus the skin can be maintained in a vital and moist state so that it is expected that the human skin can be prevented from age.
    Type: Application
    Filed: April 23, 2008
    Publication date: November 27, 2008
    Inventors: Kyoko MIURA, Tetsuya Sayo, Shingo Sakai, Shintaro Inoue
  • External Skin Composition
    Publication number: 20080287393
    Abstract: The external skin care composition of the present invention comprises N-acetylglucosamine and at least one member selected from the group consisting of retinoid and pro-vitamin A. The external skin care composition of the present invention has an effect of promoting the production of epidermal hyaluronic acid and can retain firmness and moisture of the skin.
    Type: Application
    Filed: January 18, 2008
    Publication date: November 20, 2008
    Applicant: KAO CORPORATION
    Inventors: Tetsuya Sayo, Shingo Sakai, Shintaro Inoue
  • N-acetylglucosamine derivatives and use thereof
    Patent number: 7393937
    Abstract: The present invention relates to An N-acetylglucosamine derivative represented by the following formula (1), and a hyaluronic acid production promoting agent containing the same and a skin external preparation containing the same: wherein R1 is a hydrogen atom or an alkyl group having 2 to 18 carbon atoms; R2, R3, and R4 are hydrogen atoms or acyl groups having 2 to 18 carbon atoms and may be all the same or different from others; the steric structure at position 1 may be ? or ?; provided that R1, R2, R3, and R4 must not be all hydrogen atoms. It is intended to provide an easily available hyaluronic acid production promoting agent and a skin external preparation whereby the production of hyaluronic acid can be promoted in the skin and thus the skin can be maintained in a vital and moist state so that it is expected that the human skin can be prevented from age.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: July 1, 2008
    Assignee: Kao Corporation
    Inventors: Kyoko Miura, Tetsuya Sayo, Shingo Sakai, Shintaro Inoue
  • N-acetylglucosamine derivatives and use thereof
    Publication number: 20060020127
    Abstract: The present invention relates to An N-acetylglucosamine derivative represented by the following formula (1), and a hyaluronic acid production promoting agent containing the same and a skin external preparation containing the same: wherein R1 is a hydrogen atom or an alkyl group having 2 to 18 carbon atoms; R2, R3, and R4 are hydrogen atoms or acyl groups having 2 to 18 carbon atoms and may be all the same or different from others; the steric structure at position 1 may be ? or ?; provided that R1, R2, R3, and R4 must not be all hydrogen atoms. It is intended to provide an easily available hyaluronic acid production promoting agent and a skin external preparation whereby the production of hyaluronic acid can be promoted in the skin and thus the skin can be maintained in a vital and moist state so that it is expected that the human skin can be prevented from age.
    Type: Application
    Filed: July 25, 2003
    Publication date: January 26, 2006
    Applicant: Kanebo Cosmetics Inc.
    Inventors: Kyoko Miura, Tetsuya Sayo, Shingo Sakai, Shintaro Inoue
  • External skin compositions
    Publication number: 20050002879
    Abstract: The external skin care composition of the present invention comprises N-acetylglucosamine and at least one member selected from the group consisting of retinoid and pro-vitamin A. The external skin care composition of the present invention has an effect of promoting the production of epidermal hyaluronic acid and can retain firmness and moisture of the skin.
    Type: Application
    Filed: March 11, 2002
    Publication date: January 6, 2005
    Inventors: Tetsuya Sayo, Shingo Sakai, Shintaro Inoue