Patents Assigned to Doroyokuro Kakunenryo Kaihatsu Jigyodan
  • Heat and radiation resistant optical fiber
    Patent number: 4770493
    Abstract: An optical fiber includes light-transmitting means comprising at least one optical fiber element, and a heat-resistant and radiation-resistant coating formed around the light-transmitting means. The coating comprises an inner buffer layer formed around the light-transmitting means and an outer layer of polyether ether ketone formed around the inner layer.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: September 13, 1988
    Assignees: Doroyokuro Kakunenryo Kaihatsu Jigyodan, Fujikura Ltd.
    Inventors: Kuniaki Ara, Hiroshi Rindo, Koichiro Nakamoto, Takashi Tsumanuma, Sadao Chigira, Kazuo Sanada, Osamu Fukuda