Patents by Inventor Walter L. Colterjohn, Jr.

Walter L. Colterjohn, Jr. 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).

  • Electrostatic repulsion ion microscope
    Patent number: 5602390
    Abstract: The ion microscope for imaging the surface structure of objects uses an electrostatic lens to direct an incident beam of positive ions generated from ion source toward an electrostatic center of a convex end of an object mounting electrode in a direction which provides for near normal incidence to the surface of the object mounting electrode. The object mounting electrode has an electrical potential relative to that of the ion source sufficient to repel ions upon their close approach to its surface. The electrostatic lens focuses repelled ions upon an ion detector to form an image of the surface of the object mounting electrode and of the objects mounted thereon. A magnetic field is used to separate the ion beams formed by the incident and repelled positive ions to permit location of the detector out of the path of the incident beam obtaining near normal incidence of the illuminating ion beam to the surface of the object mounting electrode.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: February 11, 1997
    Inventor: Walter L. Colterjohn, Jr.
  • Optical radiation source
    Patent number: 4877991
    Abstract: An improved optical radiation source for use in illumination that is obtained from a thinwall tubular arc lamp with a high input power density that delivers high brightness. It includes a constricting enclosure that exerts a compressive force upon the insulating tube forming the envelope of said lamp to counteract tensile strain in the tube caused by higher gas pressure within the tube and a higher thermal gradient within the walls of said tube.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: October 31, 1989
    Inventor: Walter L. Colterjohn, Jr.
  • Radiation device
    Patent number: 4868450
    Abstract: This invention provides a source of optical radiation of high brightness obtained from an output window that is located on the axis of an extended length arc discharge device. The arc discharge device is confined by an electrically insulating tubular element, and caused by the tubular element to have an extended length to diameter ratio. The tubular element is provided with a reflecting surface that improves efficiency and increases output. Means are provided to transfer heat from the tubular element and to support high internal gas pressure, and to thereby facilitate use of a very high brightness arc discharge.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: September 19, 1989
    Inventor: Walter L. Colterjohn, Jr.