Patents by Inventor William B. Stewart, Jr.

William B. Stewart, Jr. 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).

  • Maximizing process production rates using permanent constraints
    Patent number: 5457625
    Abstract: The present invention optimizes the relationship of variables associated with a process having inputs and outputs such that the process has controlled variables, manipulated variables, associated variables and disturbance variables, to maximize production rates.
    Type: Grant
    Filed: April 13, 1994
    Date of Patent: October 10, 1995
    Assignee: The M. W. Kellogg Company
    Inventors: Kian Y. Lim, Henry B. McAnally, III, William B. Stewart, Jr.
  • Portable self-contained surge level controller
    Patent number: 4956763
    Abstract: A portable self-contained surge level controller detects the liquid level in a vessel, such as by neutron backscatter, and adjusts inlet or outlet flow to compensate for incoming surges while minimizing outgoing flow disturbances.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: September 11, 1990
    Assignee: Shell Oil Company
    Inventors: William B. Stewart, Jr., Henry K. Lau, Anthony M. Leonardi-Cattolica