Patents by Inventor William B. Stewart

William B. Stewart 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).

  • Pre-molded AFT seal for discarding sabot projectiles
    Patent number: 5962807
    Abstract: The present invention is directed to a pre-molded aft seal for an armor piercing fin stabilized discarding sabot (APFSDS) projectile, comprising a plastic sleeve made from a material selected from the group consisting of thermoplastic polyurethane and thermoplastic polyester elastomer, and effective to seal an APFSDS projectile from combustion products, the plastic aft sleeve further comprising an outwardly flanged first portion having a radius of curvature of from about 0.1 to 5 inches; a constantly decreasing diameter second portion; and an inwardly flanged substantially conical third portion connected to the second portion by a curved portion having a radius of curvature of from about 0 to 0.25 inch.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: October 5, 1999
    Assignee: Primex Technologies, Inc.
    Inventors: William B. Stewart, Donald R. Osment, John W. Duchek
  • 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