Patents by Inventor Leslie A. Holland

Leslie A. Holland 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).

  • Patent number: 4627902
    Abstract: A resistance thermometer element having a thin layer of platinum metal on an insulating substrate is formed by magnetron sputtering in a gaseous atmosphere containing at least 10% by volume of oxygen. Any balance gas has less than 10% by volume of argon, krypton and xenon. The atmosphere may have up to 100% oxygen with any balance gas being inert to platinum. Air can be used. A planar magnetron may be used.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: December 9, 1986
    Assignee: Rosemount Engineering Company Limited
    Inventors: James S. Johnston, Leslie Holland, Christopher R. Wright
  • Patent number: 4382100
    Abstract: A layer of a carbonaceous material is applied to a surface by connecting the surface through capacitive means to a radio frequency source, and simultaneously exposing the surface to a plasma generated in a hydrocarbon gas.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: May 3, 1983
    Assignee: National Research Development Corporation
    Inventor: Leslie A. Holland
  • Patent number: 4311725
    Abstract: In apparatus for sensing and controlling the deposition of a thin film on to a substrate (12) from a gas or vapor phase, the optical reflectance or transmittance is sensed, the resonant frequency of a crystal (14) also exposed to the deposition is sensed, and the quotient of the change in each signal over a predetermined time interval is determined. The deposition can be terminated at a suitable thickness, for example a reflectance or transmittance maximum or minimum. Instead of an optical property, the electrical resistivity of the film may be sensed and used in the same way.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: January 19, 1982
    Assignee: National Research Development Corporation
    Inventor: Leslie Holland