Patents by Inventor Roger L Maddalena

Roger L Maddalena 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).

  • Refractory compositions and in situ anti-oxidation barrier layers
    Patent number: 11746053
    Abstract: A refractory composition for forming a working lining in a metallurgical vessel contains a coarse-grain refractory particle fraction and a fine-grain refractory particle fraction, or at least 0.25% additive calcium oxide, or at least 0.25% titanium dioxide. The coarse-grain refractory particles can include alumina particles, magnesia particles, magnesium aluminate spinel particles, zirconia particles, or doloma particles, or a combination of any of these particles. The fine-grain refractory particles can be comprised of any low-magnesia refractory oxide. The refractory composition can be applied to a metallurgical vessel by spraying, gunning, shotcreting, vibrating, casting, troweling, or positioning preformed refractory shapes, or a combination of any of these techniques.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: September 5, 2023
    Assignee: Vesuvius USA Corporation
    Inventors: Beda Mohanty, Daniel T Schaner, Roger L Maddalena
  • REFRACTORY COMPOSITIONS AND IN SITU ANTI-OXIDATION BARRIER LAYERS
    Publication number: 20210002176
    Abstract: A refractory composition for forming a working lining in a metallurgical vessel contains a coarse-grain refractory particle fraction and a fine-grain refractory particle fraction, or at least 0.25% additive calcium oxide, or at least 0.25% titanium dioxide. The coarse-grain refractory particles can include alumina particles, magnesia particles, magnesium aluminate spinel particles, zirconia particles, or doloma particles, or a combination of any of these particles. The fine-grain refractory particles can be comprised of any low-magnesia refractory oxide. The refractory composition can be applied to a metallurgical vessel by spraying, gunning, shotcreting, vibrating, casting, troweling, or positioning preformed refractory shapes, or a combination of any of these techniques.
    Type: Application
    Filed: January 29, 2019
    Publication date: January 7, 2021
    Applicant: VESUVIUS USA CORPORATION
    Inventors: Beda Mohanty, Daniel T Schaner, Roger L Maddalena