Patents by Inventor James K. Ferrell

James K. Ferrell 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).

  • Continuous in-stack pollutant monitoring system
    Patent number: 4165630
    Abstract: In abstract a preferred embodiment of the present invention is a pollutant monitoring system designed to continuously monitor and record the concentration level of a particular pollutant in a stack. The present invention incorporates an in-stack interface to condition gas samples and a microprocessor to automatically and continuously compute the pollutant level found within a stack by using input variables supplied by probes and meters located throughout the pollutant monitoring system. The microprocessor then outputs the computed pollutant levels to a strip chart recorder which in turn graphs a time versus concentration readout.
    Type: Grant
    Filed: July 14, 1977
    Date of Patent: August 28, 1979
    Assignee: North Carolina State University at Raleigh
    Inventors: Richard M. Felder, James K. Ferrell