Patents by Inventor Heiroku Suganuma

Heiroku Suganuma 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).

  • Cladding material for optical fiber and method for its manufacture
    Patent number: 5153288
    Abstract: A cladding material for plastic optical fibers is disclosed. The cladding material comprises mainly a copolymer comprising a fluoroalkyl methacrylate and an N-aliphatic maleimide as monomer units. The cladding material has low refractive index and high thermal stability, so that an optical fiber with a large acceptance angle can be obtained.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: October 6, 1992
    Assignee: Toray Industries, Inc.
    Inventors: Tadayo Matsunaga, Heiroku Suganuma, Tadanori Fukuda, Genzaburo Nakamura
  • Heat resisting plastic optical fiber and method for its manufacture
    Patent number: 4810055
    Abstract: An optical fiber of a sheath-core structure is disclosed. The fiber has for its core a copolymer which includes an aliphatic N-substituted maleimide as a monomer unit, and preferably methyl methacrylate as an additional monomer unit. These optical fibers have high light transmittance, good mechanical characteristics and an excellent heat-resisting durability.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: March 7, 1989
    Assignee: Toray Industries, Inc.
    Inventors: Heiroku Suganuma, Shoshiro Taneichi, Hisaaki Kobayashi, Tadayo Matsunaga
  • Flame-proof fiber product
    Patent number: 4794037
    Abstract: A fabric containing a cellulosic fiber and a polyester fiber having a carbonization burning mechanism, superior in flame-proofness and having a soft touch. The fabric contains a halogen- and/or phosphorus-based flame-proofing agent, and preferably also contains an amino resin.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: December 27, 1988
    Assignee: Toray Industries Incorporated
    Inventors: Yoshinori Hosoda, Shunroku Tohyama, Heiroku Suganuma