Patents by Inventor Roman P. Chaws

Roman P. Chaws 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).

  • Process and device for evaluating the performance of a process control system
    Patent number: 6865511
    Abstract: A preferred process for evaluating the performance of a process control system comprises generating a first set of data comprising a plurality of measurements of a first parameter controlled by the process control system and generating a second set of data comprising a plurality of measurements of a second parameter controlled by the process control system. A preferred process also comprises calculating a first statistical index from the first set of data using a statistical process control method, calculating a second statistical index from the second set of data using the statistical process control method, and combining the first and second statistical indices to produce a performance index representative of the performance of the process control system at controlling the first and second parameters.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: March 8, 2005
    Assignee: ABB Inc.
    Inventors: Donald K. Frerichs, Roman P. Chaws
  • Process and device for evaluating the performance of a process control system
    Publication number: 20040215353
    Abstract: A preferred process for evaluating the performance of a process control system comprises generating a first set of data comprising a plurality of measurements of a first parameter controlled by the process control system and generating a second set of data comprising a plurality of measurements of a second parameter controlled by the process control system. A preferred process also comprises calculating a first statistical index from the first set of data using a statistical process control method, calculating a second statistical index from the second set of data using the statistical process control method, and combining the first and second statistical indices to produce a performance index representative of the performance of the process control system at controlling the first and second parameters.
    Type: Application
    Filed: May 21, 2004
    Publication date: October 28, 2004
    Applicant: ABB Inc.
    Inventors: Donald K. Frerichs, Roman P. Chaws
  • Process and device for evaluating the performance of a process control system
    Patent number: 6799143
    Abstract: A preferred process for evaluating the performance of a process control system comprises generating a first set of data comprising a plurality of measurements of a first parameter controlled by the process control system and generating a second set of data comprising a plurality of measurements of a second parameter controlled by the process control system. A preferred process also comprises calculating a first statistical index from the first set of data using a statistical process control method, calculating a second statistical index from the second set of data using the statistical process control method, and combining the first and second statistical indices to produce a performance index representative of the performance of the process control system at controlling the first and second parameters.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: September 28, 2004
    Assignee: ABB Inc.
    Inventors: Donald K. Frerichs, Roman P. Chaws