Patents by Inventor Johannes van Esdonk

Johannes van Esdonk 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).

  • Color selection lens electrodes connected by diffusion bonds
    Patent number: 4066923
    Abstract: In a color display tube of the post focusing type the color selection means comprise a first and a second system of lens electrodes. A lens electrode belonging to the first system is connected by means of a diffusion bond to one of the metallized sides of an electrically insulating member which is metallized on two sides. A lens electrode belonging to the second system is formed either by the other metallized side of the insulating member or is secured to said other metallized side of the insulating member also by means of a diffusion bond.
    Type: Grant
    Filed: January 13, 1977
    Date of Patent: January 3, 1978
    Assignee: U.S. Philips Corporation
    Inventor: Johannes VAN Esdonk
  • Gas discharge display device having plural groups of cathodes
    Patent number: 4027186
    Abstract: A gas-discharge display device having a number of cathodes connected in groups and at least one common anode. The cathodes are arranged in a row extending parallel to the anode, each group consisting of spaced portions of a respective elongate conductor, the conductors being arranged in a staggered helix-like formation around a common core which has an insulating surface.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: May 31, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Gerhard Heinrich Friedrich de Vries, Johannes VAN Esdonk, Theunis Goos
  • Method of manufacturing a gas discharge panel and gas discharge panel manufacture according to said method
    Patent number: 3989871
    Abstract: Before assembling a gas discharge panel the active surfaces of the chromium-containing electrodes which constitute the cathodes are covered with a layer of sufficient thickness of platinum, aluminum or nickel which can prevent the formation of chromium oxide.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: November 2, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Johannes Van Esdonk, Johannes Petrus Hornman
  • Picture display panel
    Patent number: 3974583
    Abstract: A display panel having an intermediate plate constructed from strips in cross bond, in which luminescent and reflecting material is previously provided on the side faces of the strips.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: August 17, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Johannes Van Esdonk, Johannes Petrus Hornman, Antonius Matheus Johanna Bluekens, Mathieu Martinus Maria Petrus Mattheij
  • Gas discharge panel
    Patent number: 3942061
    Abstract: A gas discharge panel in which the cathodes are placed in grooves and are connected to the bottom of the groove throughout their length by means of low softening-point glass enamel. The glass is preferrably devitrified (crystalline).
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: March 2, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Johannes van Esdonk, Johannes Petrus Hornman
  • Gas discharge panel having electrodes secured to flat insulating plates by means of glaze
    Patent number: 3936688
    Abstract: A gas discharge panel in which at least the electrodes serving as cathodes are separated from each other by partitions which consist of electrically oxidized aluminum strips which, like the cathodes, are also connected to a flat insulating plate by means of glaze.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: February 3, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Johannes van Esdonk, Johannes Petrus Hornman