Patents by Inventor John Irven

John Irven 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).

  • Optical fiber manufacture
    Patent number: 4009014
    Abstract: A fiber optic preform is provided by depositing phosphorus pentoxide as a dopant on the bore of a silica tube to form a high refractive index layer and collapsing the tube to form a core of high index phosphorus pentoxide doped silica.
    Type: Grant
    Filed: September 3, 1975
    Date of Patent: February 22, 1977
    Assignee: International Standard Electric Corporation
    Inventors: Philip William Black, John Irven