Patents by Inventor Shizukuni Yata

Shizukuni Yata 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 for producing optical fibers and resulting fibers
    Patent number: 3999834
    Abstract: Light-focussing type optical fibers are formed from concentric circular sheath-core composite fibers composed of a sheath forming polymer having a defined solubility parameter and a defined swelling parameter, which can protect the core, and a core polymer wherein a specific monomer is introduced through the sheath into the core polymer, after which said monomer is polymerized, whereby the defined variation of refractive index from the center of the core towards the periphery of the core is formed.
    Type: Grant
    Filed: August 13, 1974
    Date of Patent: December 28, 1976
    Assignee: Kanebo, Ltd.
    Inventors: Koichiro Ohtomo, Shizukuni Yata