Patents by Inventor Johann A. Schueler

Johann A. Schueler 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).

  • Method for making cement using aragonite
    Patent number: 4054464
    Abstract: An improved process for making cement wherein aragonite, a natural orthorombic crystalline form of calcium carbonate, is employed in a substantially dry, naturally recovered, unprocessed state as the calcium carbonate constituent. The raw kiln feed of the aragonite and argillaceous materials can be introduced into the kiln together and/or separately to produce the desired raw kiln clinker feed within the kiln. The argillaceous material employed can be in a substantially dry state or can be present as an aqueous slurry.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: October 18, 1977
    Assignee: General Portland, Inc.
    Inventors: Ernest B. Thorn, Jr., Charles W. Grube, Walter W. Rowe, Johann A. Schueler