Patents by Inventor Tsunemi Kakuta

Tsunemi Kakuta 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).

  • Method of manufacturing radiation-resistant optical fiber
    Patent number: 5269825
    Abstract: A method of manufacturing a radiation-resistant optical fiber includes steps of a) heating a bare optical fiber to remove residual hydrogen gas present in the bare optical fiber and b) forming a coating layer consisting of a substance which does not allow permeation of hydrogen gas on the surface of the bare optical fiber from which the residual hydrogen gas has been removed.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: December 14, 1993
    Assignees: Fujikura, Ltd., Japan Atomic Energy Research Institute
    Inventors: Kazuo Sanada, Tsunemi Kakuta