Patents by Inventor Hans-Jurgen Guls

Hans-Jurgen Guls 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).

  • Carbon-containing and uncarbonized sinter magnesia refractories
    Patent number: 4315992
    Abstract: A refractory brick or mass is comprised of 60 to 97% of sinter magnesia, an amount of a carbon-containing substance producing a residual content of 2 to 30% of carbon in an end product after carbonization, as determined by ASTM norm C 831-76, and 1 to 20%, calculated as chromium metal, of metallic chromium or a metallic chromium compound, which is primarily fine-grained and at least 80% thereof, based on the chromium metal content, has a grain size of less than 1 mm, all percentages being by weight.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: February 16, 1982
    Assignee: Veitscher Magnesitwerke-Actien-Gesellschaft
    Inventor: Hans-Jurgen Guls