Patents by Inventor Robert M. Hagerman

Robert M. Hagerman 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).

  • Mineral wool waste cement
    Patent number: 4662941
    Abstract: A mineral wool waste cement that includes as an addition to portland cement vitreous and non-vitreous mineral wool plant waste materials. A separate ground mineral wool waste cement can be made by feeding mineral wool waste materials above or by feeding blends of mineral wool waste materials and cementitious furnace slags to a grinding plant and thereafter blending the resulting ground product with portland cement. An interground cementitious slag-portland cement clinker can be produced by feeding to a grinding plant portland cement clinker and cementitious slags made from mineral wool waste materials or combinations of mineral wool waste materials and cementitious furnace slags.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: May 5, 1987
    Assignee: Sheridan Corporation
    Inventor: Robert M. Hagerman