Patents by Inventor Hikoya Hayatsu

Hikoya Hayatsu 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).

  • COMPOSITION FOR DEAMINATING DNA AND METHOD OF DETECTING METHYLATED DNA
    Publication number: 20080070240
    Abstract: (1) A sulfite composition having a sulfite concentration of more than 6.2 M, (2) a method for deaminating DNA using a sulfite composition described in (1), (3) a method for detecting methylated DNA using a sulfite composition described in (1), (4) a kit for deaminating DNA or for detecting methylated DNA comprising a sulfite composition described in (1).
    Type: Application
    Filed: September 18, 2006
    Publication date: March 20, 2008
    Applicants: Toyo Boseki Kabushiki Kaisha, Japan as Represented by Director General of Agency of National Cancer Center
    Inventors: Hikoya HAYATSU, Kazuo NEGISHI, Masahiko SHIRAISHI
  • Composition for deaminating dna and method of detecting methylated dna
    Publication number: 20070178466
    Abstract: (1) A sulfite composition having a sulfite concentration of more than 6.2 M, (2) a method for deaminating DNA using a sulfite composition described in (1), (3) a method for detecting methylated DNA using a sulfite composition described in (1), (4) a kit for deaminating DNA or for detecting methylated DNA comprising a sulfite composition described in (1).
    Type: Application
    Filed: November 30, 2004
    Publication date: August 2, 2007
    Applicant: Toyo Boseki Kabushiki Kaisha
    Inventors: Hikoya Hayatsu, Kazuo Negishi, Masahiko Shiraishi
  • Silica gel linked to a phthalocyanine compound and a method for treating polycyclic organic substances therewith
    Patent number: 4623638
    Abstract: Silica gel is treated with a reactive phthalocyanine compound to form the blue silica gel, which has a phthalocyanine skeleton linked through an organic group. Typically, a phthalocyanine reactive dye is used for the reaction with silica gel at its hydroxyl or other reactive site. The blue silica gel easily adsorbs and desorbs the polycyclic organic substances in a solution. The blue silica gel can be used for the separation or removal of the mutagenic substances from the environment, foodstuffs, etc.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: November 18, 1986
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hikoya Hayatsu, Masahide Nakano, Yoshikazu Matsuo
  • Polysaccharides containing phthalocyanine nucleus
    Patent number: 4490525
    Abstract: Metal-containing or metal-free phthalocyanine-polysaccharide complex defined below is used for removal of mutagens and carcinogens present in aqueous solutions, the said complex having formula of ##STR1## wherein Pc is a metal-containing or metal-free phthalocyanine residue, A is an alkylene group having 2 to 6 carbon atoms or an arylene group having 1 to 3 rings, the integers m and n satisfy both 2<m+n.ltoreq.4 and 1.ltoreq.n.ltoreq.2, and Z is an activated polysaccharide residue.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: December 25, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hikoya Hayatsu, Yasuo Tezuka
  • Method for treatment of mutagens
    Patent number: 4460475
    Abstract: Mutagenic substances in solutions are selectively adsorbed by specific solid adsorbents bearing covalently bound phthalocyanine derivatives. The adsorbents are prepared by coupling the organic solid materials, for instance, cotton and cellulose powder, with phthalocyanine derivatives having chemically reactive terminal groups. Such reactive phthalocyanines are commercially available as phthalocyanine reactive dyes.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: July 17, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hikoya Hayatsu, Masahide Nakano