Patents by Inventor Daniel D. Walker

Daniel D. Walker 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).

  • Energy conserving limestone calcining system
    Patent number: 4748010
    Abstract: Energy conserving limestone calcining system, including a process and apparatus in which in a first step or kiln zone limestone is heated, e.g., at 1700.degree.-2100.degree. F., sufficiently to achieve more than only about 50 or 60%, e.g.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: May 31, 1988
    Assignee: Chemstar, Inc.
    Inventor: Daniel D. Walker