Patents by Inventor Tadatoshi Fujinaga

Tadatoshi Fujinaga 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).

  • Phosphorus-containing phenolic resin, method for manufacturing the same, and use of the same
    Patent number: 8981014
    Abstract: The present invention provides a novel phosphorus-containing phenolic resin. When the phosphorus-containing phenolic resin is used as an epoxy resin curing agent, the cured product thereof has various excellent properties such as excellent moisture resistance, low permittivity, a low dissipation factor, and excellent adhesion in addition to improved flame retardation. Specifically, the phosphorus-containing phenolic resin of the invention is represented by formula (1). The invention also provides a method for manufacturing the novel phosphorus-containing phenolic resin, a phenolic resin composition including the phosphorus-containing phenolic resin, an epoxy resin curing agent including the phenolic resin composition, an epoxy resin composition including the epoxy resin curing agent and an epoxy resin, a cured product obtained by curing the epoxy resin composition, and a copper-clad laminated plate obtained by using the epoxy resin composition as a matrix resin.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: March 17, 2015
    Assignees: Meiwa Plastic Industries, Ltd., UFC Corporation
    Inventors: Masato Takenouchi, Tadatoshi Fujinaga, Erina Kimura, Yu-Chin Lee, Jen-Hai Liao, Sung-Chen Lo
  • PHOSPHORUS-CONTAINING PHENOLIC RESIN, METHOD FOR MANUFACTURING THE SAME, AND USE OF THE SAME
    Publication number: 20140378622
    Abstract: The present invention provides a novel phosphorus-containing phenolic resin. When the phosphorus-containing phenolic resin is used as an epoxy resin curing agent, the cured product thereof has various excellent properties such as excellent moisture resistance, low permittivity, a low dissipation factor, and excellent adhesion in addition to improved flame retardation. Specifically, the phosphorus-containing phenolic resin of the invention is represented by formula (1). The invention also provides a method for manufacturing the novel phosphorus-containing phenolic resin, a phenolic resin composition including the phosphorus-containing phenolic resin, an epoxy resin curing agent including the phenolic resin composition, an epoxy resin composition including the epoxy resin curing agent and an epoxy resin, a cured product obtained by curing the epoxy resin composition, and a copper-clad laminated plate obtained by using the epoxy resin composition as a matrix resin.
    Type: Application
    Filed: May 16, 2014
    Publication date: December 25, 2014
    Applicants: MEIWA PLASTIC INDUSTRIES, LTD., UFC CORPORATION
    Inventors: Masato Takenouchi, Tadatoshi Fujinaga, Erina Kimura, Yu-Chin Lee, Jen-Hai Liao, Sung-Chen Lo