Patents by Inventor Henry E. Grattan

Henry E. Grattan 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).

  • Flue gas heat recovery system
    Patent number: 4308990
    Abstract: A flue gas heat recovery system includes a heat exchanger fluidly interposed between a furnace and a chimney to receive hot flue gas from the furnace. The heat exchanger is releasably mounted in the chimney and includes a partition which forces air being heated by the heat exchanger to traverse a path through the heat exchanger which maximizes the time of contact between that air and the heat exchanger heating elements. The partition further creates turbulence in the heat air.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: January 5, 1982
    Inventors: Anton Borovina, Henry E. Grattan, Mark Borovina