Patents by Inventor Helmut Neuper

Helmut Neuper 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).

  • Fired refractory brick and process for preparing the same
    Patent number: 4073656
    Abstract: A fired refractory brick composed of magnesia, 2 to 10% alumina, calcium oxide and up to 1.5% silica, the weight ratio of calcium oxide to silica being more than 1.4, and at least 2.2(CaO -1.4 SiO.sub.2)% zirconia, calcium and zirconium forming a calcium zirconate phase in the brick and the content of the calcium zirconate phase being from 0.5 to 8%, all percentages being by weight. This brick is prepared from a mixture of the components by pressing the mixture into the shape of a brick and firing the brick at a temperature of 1600.degree. C to 1800.degree. C until the brick contains the indicated amount of the calcium zirconate phase.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: February 14, 1978
    Assignee: Veitscher Magnesitwerke-Actien-Gesellschaft
    Inventors: Hans-Jurgen Gulas, Helmut Neuper