Patents by Inventor Ludwig Rehder

Ludwig Rehder 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).

  • Method of manufacturing an electrode for a high-pressure gas discharge lamp and electrode for such a lamp
    Patent number: 4525379
    Abstract: A thickened part (1) of a high-melting metal, which may contain emitter material, is formed on a carrier (2) of a high-melting metal. In order to manufacture such electrode structures in mass production and to obtain both various material transitions and combinations and optimum designs, the thickened part (1) is formed by reactive deposition from the gaseous phase (CVD method), preferably by laser-supported deposition from the gaseous phase.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: June 25, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Horst Hubner, Hans Lydtin, Ludwig Rehder, Thomas Zaengel
  • Method of producing internally coated glass tubes for the drawing of fibre optic light conductors
    Patent number: 4145456
    Abstract: In the reactive deposition of the core material from a gas which is passed through the tube onto the inner wall of the tube by means of a plasma zone, while a relative motion is effected in the axial direction between the tube and a plasma-producing device, the rate of precipitation is increased without impairing the quality of the core material coat, the reactive deposition being effected at a pressure of from 1 to 100 Torr and a temperature zone being superimposed on the plasma zone.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: March 20, 1979
    Inventors: Dieter Kuppers, Hans Lydtin, Ludwig Rehder
  • Metallic halide high-pressure gas discharge lamp
    Patent number: 4015164
    Abstract: Metallic halide high-pressure gas discharge lamp whose filling contains elementary arsenic during operation.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: March 29, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Ernst Fischer, Roland Lorenz, Ludwig Rehder
  • Metal iodide vapour discharge lamp
    Patent number: 3947714
    Abstract: To obtain an iron spectral lamp iron iodide and hydrogen are introduced into a discharge lamp.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: March 30, 1976
    Inventors: Ludwig Rehder, Renate Kaiser, Roland Lorenz
  • Method of producing internally coated glass tubes for the drawing of fibre optic light conductors
    Patent number: RE30635
    Abstract: In the reactive deposition of the core material from a gas which is passed through the tube onto the inner wall of the tube by means of a plasma zone, while a relative motion is effected in the axial direction between the tube and a plasma-producing device, the rate of precipitation is increased without impairing the quality of the core material coat, the reactive deposition being effected at a pressure of from 1 to 100 Torr and a temperature zone being superimposed on the plasma zone.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: June 2, 1981
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Kuppers, Hans Lydtin, Ludwig Rehder