Patents by Inventor Akira Sendai

Akira Sendai 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).

  • Buffered optical fiber and manufacturing method thereof
    Patent number: 7539383
    Abstract: A buffered optical fiber having an excellent pistoning characteristic compared with a conventional one and a manufacturing method thereof are provided. The buffered optical fiber of the present invention is composed of an optical fiber with a primary coating layer and a secondary coating layer provided on a circumference of a glass optical fiber and a tertiary coating layer having thermoplastic polyester elastomer as the main ingredient provided on a circumference of the optical fiber and is characterized in that an outer diameter of the primary coating layer is 180 to 200 ?m, an outer diameter of the secondary coating layer is 350 to 450 ?m and the product of a thickness of the secondary coating layer of the optical fiber and a force of pulling out the glass optical fiber from the optical fiber is 720 N/mm·?m or more.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: May 26, 2009
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Akira Sendai, Kazuhisa Kashihara, Yukio Ishii, Tomoaki Gonohe
  • BUFFERED OPTICAL FIBER AND MANUFACTURING METHOD THEREOF
    Publication number: 20080131062
    Abstract: A buffered optical fiber having an excellent pistoning characteristic compared with a conventional one and a manufacturing method thereof are provided. The buffered optical fiber of the present invention is composed of an optical fiber with a primary coating layer and a secondary coating layer provided on a circumference of a glass optical fiber and a tertiary coating layer having thermoplastic polyester elastomer as the main ingredient provided on a circumference of the optical fiber and is characterized in that an outer diameter of the primary coating layer is 180 to 200 ?m, an outer diameter of the secondary coating layer is 350 to 450 ?m and the product of a thickness of the secondary coating layer of the optical fiber and a force of pulling out the glass optical fiber from the optical fiber is 720 N/mm·?m or more.
    Type: Application
    Filed: January 29, 2008
    Publication date: June 5, 2008
    Applicant: The Furukawa Electric Co., Ltd.
    Inventors: Akira Sendai, Kazuhisa Kashihara, Yukio Ishii, Tomoaki Gonohe