Patents by Inventor Karl Shaffer

Karl Shaffer 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).

  • Apparatus and method for infrared optical electronic qualitative analysis of a fluid independent of the temperature thereof
    Patent number: 4649711
    Abstract: An apparatus and method is provided for infrared qualitative analysis of a fluid independent of the temperature of the fluid. A first signal is generated in response to detected infrared energy passing through the fluid, and a second datum signal is provided for comparison with the first signal, wherein the second signal indicates a non-radiating state. The energy difference between the two signals is provided to a microprocessor control system for computing the fluid quality as a function of the energy difference independent of the temperature of the fluid.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: March 17, 1987
    Assignee: Carrier Corporation
    Inventors: Howard W. Sibley, Karl Shaffer