Patents Assigned to Zellweger Analytics, Inc.
  • Hydride gas detecting tape
    Patent number: 6217827
    Abstract: A substrate such as a porous tape coated with an adsorbent and impregnated with a processing solution which includes a silver salt, an organic acid such as benzenetricarboxylic acid or benzenesulfonic acid (with or without the addition of nitric acid) and a glycol is a sensitive detecting means for hydride gases and is stable upon exposure to light.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: April 17, 2001
    Assignee: Zellweger Analytics, Inc.
    Inventors: Jingnian Zhang, Roberta L. McMahon
  • Backpressure regulating flow cell that may be utilized with sensor
    Patent number: 6117684
    Abstract: A flow cell for use in an analytical system of the type that may be used to test water samples for specific analytes. The flow cell reduces or eliminates the effects of backpressure on a liquid stream passing through the flow cell. This allows a sensor to be incorporated with the flow cell and enables the sensor to provide consistent output with respect to the analyte being tested without introducing signal error due to backpressure fluctuations.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: September 12, 2000
    Assignee: Zellweger Analytics, Inc.
    Inventors: Scott W. Stieg, James A. Dittmar, Karin L. Bogren