Patents by Inventor John T. Creehan

John T. Creehan 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 of controlling the amount of seed material in the precipitation stage of the Bayer process
    Patent number: 4150952
    Abstract: A method for sampling and controlling the addition of suspended gases, liquids and solids in a control stream to a process stream is disclosed wherein the surface area of the suspended material acts as the determining feature for control of the process. The measured surface area is compared with a preselected surface area to control the addition of the suspended material. This method is particularly useful for the control of particulate seed material to the process stream in the Bayer process for the production of alumina. The method is also broadly applicable to physical and/or chemical control means in an analytical scheme for controlling and monitoring any process.
    Type: Grant
    Filed: July 21, 1977
    Date of Patent: April 24, 1979
    Assignee: Ormet Corporation
    Inventors: Alonzo D. Lafleur, John T. Creehan, Robert E. Baugh