Patents by Inventor Trevor MacDougall

Trevor MacDougall 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).

  • Low loss infrared transmitting hollow core optical fiber method of manufacture
    Patent number: 5221308
    Abstract: A method of producing a hollow core optical fiber comprises the steps of depositing a thermal buffer layer on the interior wall of a silica tube, depositing a film of germanium silicate cladding on said buffer layer, heating the composite structure so formed to its drawing temperature, and drawing the heated composite structure to form a hollow core optical fiber.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: June 22, 1993
    Assignee: 3M
    Inventors: David A. Krohn, Trevor MacDougall, Paul Sanders, Mokhtar S. Maklad