Patents by Inventor Karl Friedrich Luft

Karl Friedrich Luft 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).

  • Non-dispersive infrared gas analyzer
    Patent number: 3968370
    Abstract: An auxiliary signal for the compensation of the difference signal created in optical-pneumatic receivers due to the absorption of radiation, such compensation being achieved by one or more electrical-pneumatic transmitters connected directly to the receiver chambers.
    Type: Grant
    Filed: December 26, 1974
    Date of Patent: July 6, 1976
    Assignee: Bergwerksverband GmbH
    Inventor: Karl Friedrich Luft
  • Non-dispersive infrared gas analysis device with triple layer receiver
    Patent number: 3968369
    Abstract: A radiation receiver including three receiver layers for infrared gas analysis. The first and third layers are connected in parallel, and their pressure is compared with that of the second or middle layer to derive a pressure difference which compensates for certain measurement problems found in prior art devices.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: July 6, 1976
    Assignee: Bergwerksverband GmbH
    Inventor: Karl Friedrich Luft