Patents by Inventor Walter Lukas

Walter Lukas 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).

  • Patent number: 4405723
    Abstract: The invention relates to ceramic fibers and wools formed from silicate-containing melts of combustion residues of fossile fuels and to a process for the production of said fibers and wools. The new fibers and wools are characterized in that they are spun from melts heated to temperatures of 700.degree. to 1650.degree. C., in particular from 1000.degree. to 1450.degree. C., and consisting of untreated fly ash or of a mixture of the components a+b or a+c or a+b+c. the components a, b, c being the following:(a) untreated fly ash, in particular filter ashes from thermal power stations,(b) at least one inorganic flux from the group consisting of alkaline (earth) borates, alkaline (earth) oxides, alkaline (earth) hydroxides, alkaline (earth) carbonates, alkaline (earth) phosphates, alkaline (earth) fluorides, alkaline (earth) silicates, cryolites and feldspars, and(c) technical glass, in particular scrap glass.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: September 20, 1983
    Assignee: Gmundner Zementwerke Hans Hatschek Aktiengesellschaft
    Inventors: Adolf Kainzner, Wolfgang Gerger, Walter Lukas
  • Patent number: 4296089
    Abstract: The invention provides inorganic fibers based on calcium sulfate dihydrate or calcium sulfate aluminate hydrate (or their dehydration products), wherein the ratio of average length to diameter of the fibers is more than 100:1 and the length of the fibers is at least 0.2 mm; preferably the ratio of average length to diameter is 300-800:1, and the length is 0.5-6 mm.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: October 20, 1981
    Assignee: Suddeutsche Kalkstickstoff-Werke
    Inventors: Alois Aignesberger, Walter Lukas, Ekkehard Weinberg
  • Patent number: 4270954
    Abstract: The invention provides inorganic fibers based on calcium sulfate dihydrate or calcium sulfate aluminate hydrate (or their dehydration products), wherein the ratio of average length to diameter of the fibers is more than 100:1 and the length of the fibers is at least 0.2 mm; preferably the ratio of average length to diameter is 300-800:1, and the length is 0.5-6 mm.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: June 2, 1981
    Assignee: Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft
    Inventors: Alois Aignesberger, Walter Lukas, Ekkehard Weinberg