Patents by Inventor Haruo Kohyama

Haruo Kohyama 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).

  • Fire-retardant resin composition
    Patent number: 4254242
    Abstract: A fire-retardant resin composition comprising(A) an aromatic copolyester derived from (1) a mixture of terephthalic acid and isophthalic acid and/or the functional derivatives thereof and (2) a bisphenol and/or the functional derivatives thereof;(B) a polyamide; and(C) an aromatic halogen compound; with component (C) being present in a higher concentration in component (A) than in component (B). Molded articles prepared from the resin composition have superior mechanical properties, thermal stability, chemical properties and fire retardancy.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: March 3, 1981
    Assignee: Unitika Ltd.
    Inventors: Kayomon Kyo, Yasuhiko Asai, Haruo Kohyama
  • Fire-retardant resin composition
    Patent number: 4171330
    Abstract: A fire-retardant resin composition comprising(A) an aromatic copolyester derived from(1) a mixture of terephthalic acid and isophthalic acid or the functional derivatives thereof and(2) a bisphenol or the functional derivatives thereof,(B) a polyamide,(C) a polyalkylene phenylene ester or a polyalkylene phenylene ester ether and(D) an aromatic halogen compound. The resin composition has superior moldability, and molded articles prepared from the resin composition have superior chemical properties, thermal stability, mechanical properties and fire retardancy. The resin composition may additionally contain (E) a fire-retardant assistant.
    Type: Grant
    Filed: January 20, 1978
    Date of Patent: October 16, 1979
    Assignee: Unitika Ltd.
    Inventors: Kayomon Kyo, Katsuhiro Hirose, Kenji Yasue, Sinichi Tokumitsu, Haruo Kohyama