Patents by Inventor LeGrand G. Van Uitert

LeGrand G. Van Uitert 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).

  • Structure for solid state switch
    Patent number: 4187530
    Abstract: Certain structures are described for solid state electrical switches which employ electrochromic material. These structures involve use of a common base contact for both switching and readout circuits. The structures are particularly easy to fabricate using integrated circuit techniques and exhibit reduced electrical shorts due to reduced migration of metallic ions.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: February 5, 1980
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Shobha Singh, LeGrand G. Van Uitert, George J. Zydzik
  • Solid state electrical switch employing electrochromic material
    Patent number: 4163982
    Abstract: A solid state electrical switch is described which exhibits high off/on resistance ratios and low insertion loss. An additional advantage is that removal of the switching energy does not alter the status (off or on) of the switch. The active solid state material in the switch is an electrochromic material (e.g., tungsten trioxide) which undergoes a transformation from insulator to metallic conductor on injection of certain ions.
    Type: Grant
    Filed: April 29, 1977
    Date of Patent: August 7, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Mauro Di Domenico, Jr., Shobha Singh, Legrand G. Van Uitert
  • Electroluminescent optical devices
    Patent number: 4159443
    Abstract: Devices of the nature of magnetic bubble devices, but in which "bits" take the form of light spots, are described. A prototypical device takes the form of an electroluminescent, photoconducting film straddled by orthogonal arrays of insulated strip electrodes forming closely spaced intercept positions so arranged that during operation such intercepts are sequentially biased. A light spot once nucleated--e.g., through a combination of electroinduced and photoinduced luminescence, is stepped by applying bias below nucleation threshold. Devices may serve a variety of memory and/or logic functions.
    Type: Grant
    Filed: July 18, 1978
    Date of Patent: June 26, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Hans J. Stocker, LeGrand G. Van Uitert
  • Process for producing evaporated gold films
    Patent number: 4146309
    Abstract: A process is described for producing devices with gold films on surfaces composed of certain inorganic fluoride compounds. An adhesion compound such as lead fluoride, cadmium fluoride or tin fluoride or mixtures of these compounds is interspersed between inorganic fluoride surface and gold film. This process is particularly attractive for the fabrication of electrochromic display devices and solid-state switches. This procedure insures good adhesion of gold film to inorganic fluoride and insures high reliability in the manufacture of such devices. In addition, electrodes made in accordance with the invention have highly desirable electrical characteristics including ohmic resistance characteristics and low electrode resistances.
    Type: Grant
    Filed: March 10, 1978
    Date of Patent: March 27, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Shobha Singh, LeGrand G. Van Uitert, George J. Zydzik