Patents by Inventor N. Michael Seibert

N. Michael Seibert 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).

  • Method and system for monitoring the quality of a water purification apparatus
    Patent number: 5450358
    Abstract: A water quality monitoring system (30) assessing the performance of a water purification apparatus (10) which compares the current percentage differential ion concentration or rejection ratio (R.sub.x), between the upstream inlet (12) and downstream outlet (14) of the purification apparatus (10), with a previous sequence of rejection ratios (R.sub.1, . . . R.sub.n) to determine the true performance of the water purification apparatus (10). Each R.sub.x value is determined at a different selected time for use in conjunction with a computation device (40) interconnected between a comparator device (38), calculating R.sub.x, and a storage mechanism (42), storing the sequence of (R.sub.1, . . . R.sub.n) values. The computation device (40) computes a performance value (PV) which is an indication of the filter membrane performance. This performance value is calculated according to a predetermined formula which incorporates the rejection ratios (R.sub.1, . . . R.sub.n) as variables.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: September 12, 1995
    Assignee: McKesson Corporation
    Inventors: N. Michael Seibert, Hilton L. Stonerock