Patents by Inventor Wolfgang Kohlweiler

Wolfgang Kohlweiler 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).

  • Soldering paste for hard-soldering and coating aluminum and aluminum alloys
    Patent number: 6656290
    Abstract: A soldering paste for hard-soldering and coating working parts made of aluminum or aluminum alloys, which contains 25 to 35 percent in weight of a water-miscible organic binding agent on the basis of aliphatic glycols, 25 to 45 percent in weight of an aluminum hard-soldering powder, 25 to 45 percent in weight of an aluminum fluxing agent and, as an additive to influence the rheological properties, 0.01 to 0.2 percent by weight with respect to the total amount of one or several fatty acids with 10 to 20 C atoms and/or their ammonium salts.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: December 2, 2003
    Assignee: Degussa Aktiengesellschaft
    Inventors: Jürgen Koch, Leander Staab, Wolfgang Kohlweiler, Karl-Anton Starz
  • Flux for brazing difficult to wet metallic materials
    Patent number: 6613159
    Abstract: A flux based on inorganic boron and/or halogen compounds for brazing difficult to wet metallic materials with silver- and copper-based solders, which contains, as an activating addition, based on the total amount of the flux, 0.01-10 wt. % of elemental boron and 0.01-10 wt. % of at least one of the elements Mo, W, Mn, Co, Ni, Pd, Cu or Ag in the form of elements, alloys or compounds. The activating addition brings about a substantial increase in the wettability by the solder, particularly in the case of difficult to wet stock materials.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: September 2, 2003
    Assignee: Degussa-Huls Aktingesellschaft
    Inventors: Jürgen Koch, Sandra Wittpahl, Wolfgang Weber, Wolfgang Kohlweiler