Patents by Inventor Munehito Nagai

Munehito Nagai 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).

  • Hydrogenated aromatic oligomers and process for preparing the same
    Patent number: 6921842
    Abstract: The hydrogenated aromatic oligomer of this invention is represented by the following formula (1) (A-F)n-A??(1) (wherein A is a segment comprising mainly a polycyclic aromatic compound, a phenol and at least partly hydrogenated products of these two, F is methylene or dimethylene ether and n is a number in the range of 1-100) and obtained by the reaction of a polycyclic aromatic compound such as naphthalene with formaldehyde or a derivative thereof and a phenol in the presence of an acid catalyst followed by hydrogenation of the product aromatic oligomer. This oligomer is odorless, highly transparent and useful as an improver of the adhesiveness and vibration damping properties when incorporated in resins and rubbers and performs excellently as a vibration damping agent in a wide temperature range.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: July 26, 2005
    Assignee: Nippon Steel Chemical Co., Ltd.
    Inventors: Toshihide Senzaki, Takahiro Imamura, Takehiro Shimizu, Munehito Nagai
  • Hydrogenated aromatic oligomers and process for their production
    Publication number: 20040014930
    Abstract: The hydrogenated aromatic oligomer of this invention is represented by the following formula (1)
    Type: Application
    Filed: January 10, 2003
    Publication date: January 22, 2004
    Inventors: Toshihide Senzaki, Takahiro Imamura, Takehiro Shimizu, Munehito Nagai