Patents by Inventor Paul D. Doud

Paul D. Doud 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).

  • Polarization retaining fiber
    Patent number: 6587624
    Abstract: A glass preform is drawn into a fiber. Holes, running the length of the preform, collapse during the drawing, causing the core to have an elliptical cross section.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: July 1, 2003
    Assignee: Corning Incorporated
    Inventors: William R. Christoff, Paul D. Doud, John W. Gilliland
  • Polarization retaining fiber
    Publication number: 20020061402
    Abstract: PURPOSE: To form a polarization maintaining optical fiber which is long-sized and improves remarkably a polarization characteristic by forming a core of a circular or elliptical shape and forming a refractive index distribution of said core into a graded type shape.
    Type: Application
    Filed: December 11, 2001
    Publication date: May 23, 2002
    Inventors: William R. Christoff, Paul D. Doud, John W. Gilliland
  • Method of making polarization retaining fiber
    Patent number: 6360565
    Abstract: A glass preform (10) is drawn into a fiber. Holes (13), running the length of the preform (10), collapse during the drawing, this causes the core (11) to have an elliptical cross section.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: March 26, 2002
    Assignee: Corning Incorporated
    Inventors: William R. Christoff, Paul D. Doud, John W. Gilliland