Patents by Inventor John Neil Coles

John Neil Coles 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).

  • Ion microprobes
    Patent number: 3963923
    Abstract: An ion microprobe has an ion extraction arrangement formed by a pair of cone-shaped guard electrodes. The guard electrodes are positioned to lie tangentially to each other and to a planar surface from which ions are extracted with their apexes coinciding at the point of extraction. They have equal apex angles of preferably 90.degree.. An aperture is provided at the common apex and electric fields oppositely polarized with respect to each other are provided within each guard electrode for ion and electron beam extraction.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: June 15, 1976
    Assignee: National Research Development Corporation
    Inventors: John Neil Coles, James Victor Percival Long