Patents by Inventor James R. Kardas

James R. Kardas 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).

  • Patent number: 3976047
    Abstract: A heat exchanger for optimizing the room heating efficiency of a typical fireplace which comprises a plenum including a radially extending housing having sloped top and bottom walls connected at a closed apex. The housing includes respective air inlet and outlet passages and means for removably mounting the plenum a predetermined distance above a fireplace hearth. The means locates the rearward end of the air inlet passage provided in the plenum angularly above the hearth and the apex of the plenum housing defines a flue passage with the rearward wall of the fireplace for expulsion of effluent gases. The plenum and means are discrete and separable from the fireplace.
    Type: Grant
    Filed: June 5, 1974
    Date of Patent: August 24, 1976
    Assignee: American Stovalator Corporation
    Inventors: Max Breen, James R. Kardas
  • Patent number: D243752
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: March 22, 1977
    Inventor: James R. Kardas