Patents by Inventor Robert S. Caldwell

Robert S. Caldwell 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).

  • Photoactive coating for hardening optical fibers
    Patent number: 4626068
    Abstract: An improved optical fiber structure is provided which is hardened against the effects of ionizing nuclear radiation and comprises a conventional plastic, glass or silica optical fiber core and cladding, having an additional outer coating comprising phosphorescent or luminescent material for interacting with the ionizing radiation to provide a source of light to optically bleach the fiber core of optical absorption sites produced as a result of the interaction of the ionizing radiation with the fiber core material.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: December 2, 1986
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Robert S. Caldwell