Patents by Inventor Tooru Maruno

Tooru Maruno 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).

  • Optical adhesive composition
    Patent number: 4637939
    Abstract: The adhesive composition or compound of the invention comprises an epoxy resin, a reactive diluent and a hardener, and at least one of said components contains fluorine atoms. The adhesive composition containing fluorine atoms, according to the invention, provides a cured or hardened composition having small refractive index due to the presence of fluorine atoms. The refractive index of the hardened product may be freely controlled within the range of n.sub.D.sup.23 =1.415 to n.sub.D.sup.23 =1.570.The adhesive composition may be applied for the production of optical members for use in a communication system utilizing optical fibers or in a variety of optical instruments, and has improved heat resistance and adhesive property and is improved in matching of the refractive index with that of the material used for the optical member, such as optical fibers or glasses having lower refractive index used in a lens system.
    Type: Grant
    Filed: February 7, 1986
    Date of Patent: January 20, 1987
    Assignee: Nippon Telegraph & Telephone Public Corporation
    Inventors: Tooru Maruno, Kouzaburou Nakamura, Shigekuni Sasaki
  • Optical adhesive composition
    Patent number: 4591627
    Abstract: The adhesive composition or compound of the invention comprises an epoxy resin, a reactive diluent and a hardener, and at least one of said components contains fluorine atoms. The adhesive composition containing fluorine atoms, according to the invention, provides a cured or hardened composition having small refractive index due to the presence of fluorine atoms. The refractive index of the hardened product may be freely controlled within the range of n.sub.D.sup.23 =1.415 to n.sub.D.sup.23 =1.570.The adhesive composition may be applied for the production of optical members for use in a communication system utilizing optical fibers or in a variety of optical instruments, and has improved heat resistance and adhesive property and is improved in matching of the refractive index with that of the material used for the optical member, such as optical fibers or glasses having lower refractive index used in a lens system.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: May 27, 1986
    Assignee: Nippon Telegraph & Telephone Public Corporation
    Inventors: Tooru Maruno, Kouzaburou Nakamura, Shigekuni Sasaki