Patents by Inventor Klaus F. Lippe

Klaus F. Lippe 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).

  • Process for the manufacture of construction materials
    Patent number: 5788761
    Abstract: A process in which the conventional sulfate components in an aerated concrete mixture, such as gypsum, semihydrate or anhydrite, are replaced at least in part by calcium aluminum sulfates and/or calcium aluminate sulfate hydrates. As a result, agglomeration of the lime, retardation of the lime hydration, and aftergrowth of the cut aerated concrete cakes are reduced or even ruled out. In addition, the number of molds used can be reduced with the process in accordance with the invention, whereby the use of one single mold is achievable.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: August 4, 1998
    Assignee: Ytong Aktiengesellschaft
    Inventors: Dieter Hums, Klaus F. Lippe
  • Method of producing hydrothermally cured aerated concrete building units
    Patent number: 4422989
    Abstract: A method of producing gas concrete. Water, lime, cement and sand are pre-mixed. A calcium sulphate-containing component is subsequently mixed in and a rising agent is later admixed to form a castable mass suitable for making gas concrete by the conventional steps of pouring into a mold, permitting the mass to rise and harden sufficiently to be cut to size, and hydrothermally cured. By following the indicated procedure for making the castable mass, the calcium sulphate-containing component can be advantageously used.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: December 27, 1983
    Assignee: Intong AB
    Inventors: Dieter Hums, Armin Hartmann, Klaus F. Lippe, Werner Wetzig