Patents by Inventor Wade C. Stewart

Wade C. 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).

  • Use of pressure and temperature measurements to infer process variables and to monitor equipment conditions and infer process efficiency in a multi-effect evaporator system
    Patent number: 6471823
    Abstract: The invention disclosed herein provides methods for monitoring performance and efficiency for multi-effect evaporator systems. The invention also provides methods for monitoring the nonvolatile content of liquid products by determination of a boiling point rise. The invention involves monitoring methods that are improved over previous methods in view of their simplicity, and/or effectiveness, and/or, low cost. The methods of the invention enable system monitoring and problem diagnosis using measurements of a relatively small number of relatively easily accessible process operating parameters.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: October 29, 2002
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventor: Wade C. Stewart
  • Topology analysis tool for use in analyzing a process control network design
    Patent number: 6411923
    Abstract: The present invention is directed to an analysis tool for aiding in the design of a process control system which conforms to a standard protocol. Such a tool advantageously allows the efficient design of a process control system while ensuring that the physical characteristics of the system conform to the standard.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: June 25, 2002
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Wade C. Stewart, David M. Hyde, Deborah R. Colclazier, Doyle E. Broom