Patents by Inventor Andrew Peter Harrison

Andrew Peter Harrison 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 fibre manufacture
    Patent number: 4087266
    Abstract: A method is described of increasing the proportion of chemical vapor reaction deposited material to substrate material in a silica optical fiber preform. The deposited material is deposited upon the bore of a silica substrate tube whose bore is then collapsed to form the preform. The preform is then heated to cause some of the surface of the preform to be driven off by volatilization in order to increase the proportion of chemical vapor reaction deposited material to substrate material up to a predetermined value.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: May 2, 1978
    Assignee: International Standard Electric Corporation
    Inventors: John Irven, Andrew Peter Harrison