Patents by Inventor Ashim K. Bannerjee

Ashim K. Bannerjee 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).

  • System for verifying the calibration of a turbidimeter
    Patent number: 5912737
    Abstract: A system is described for verifying the calibration of a turbidimeter having a light source and a detector for scattered light. A first polarizer is positioned in the path of the light beam, and a second polarizer is positioned between the first polarizer and the detector. The first polarizer linearly polarizes the light beam and the second polarizer restricts the amount of light passing through it to reach the detector.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: June 15, 1999
    Assignee: Hach Company
    Inventors: Ashim K. Bannerjee, Robert D. Stream