Patents by Inventor Edward L. Manigault

Edward L. Manigault 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).

  • Alumina-chrome refractory
    Patent number: 3948670
    Abstract: An improved alumina-chrome refractory composition having increased strength at both ambient and high temperatures has been prepared comprising the following ingredients:Tabular Alumina 70-96% Calcined Alumina -325 mesh 0-10% Milled Zircon -325 mesh 1-10% Chromic Oxide Refractory Grains Ground to -10 mesh with at Least 70% +200 mesh 3-10% Bentonite 0-4% Water 0-10% Phosphate Compound 0-18%
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: April 6, 1976
    Assignee: NL Industries, Inc.
    Inventor: Edward L. Manigault
  • Alumina refractory
    Patent number: 3945839
    Abstract: A new refractory material has been prepared comprising 70 to 96% alumina, 3 to 20% iron chromite ore, and 1 to 10% of a phosphate compound, calculated as P.sub.2 O.sub.5.The new refractory material is prepared by admixing 70% to 96% alumina, 3% to 20% iron chromite ore, and 1% to 10% of a phosphate compound selected from the group consisting of aluminium phosphate and phosphoric acid, said phosphate compound calculated at P.sub.2 O.sub.5, and firing the mixture to form the refractory product. This new refractory material has a low porosity, high bulk density and modulus of rupture.
    Type: Grant
    Filed: October 3, 1974
    Date of Patent: March 23, 1976
    Assignee: N L Industries, Inc.
    Inventor: Edward L. Manigault