Patents by Inventor Rie Azuma

Rie Azuma 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 of producing poly(ortho-methylphenol)
    Patent number: 7321054
    Abstract: Poly(ortho-methylphenol) is obtainable at high purities and yields using industrial processes by causing a secondary amine and formaldehyde to react with a polyphenol (first step), and then breaking down the aminomethyl group of the obtained poly(ortho-aminomethyl)phenol by means of hydrogenolysis in the presence of a hydrogenation catalyst (second step).
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: January 22, 2008
    Assignee: Honshu Chemical Industry Co., Ltd.
    Inventors: Rie Azuma, Tadashi Hiramine
  • METHOD OF PRODUCING POLY(ORTHO-METHYLPHENOL)
    Publication number: 20070197832
    Abstract: Poly(ortho-methylphenol) is obtainable at high purities and yields using industrial processes by causing a secondary amine and formaldehyde to react with a polyphenol (first step), and then breaking down the aminomethyl group of the obtained poly(ortho-aminomethyl)phenol by means of hydrogenolysis in the presence of a hydrogenation catalyst (second step).
    Type: Application
    Filed: February 6, 2007
    Publication date: August 23, 2007
    Inventors: Rie AZUMA, Tadashi HIRAMINE