Patents by Inventor Martin Monroe Hoch

Martin Monroe Hoch 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).

  • Intermittent cooling of fuel cell
    Patent number: 6764781
    Abstract: Process for improving the efficiency of a fuel cell system having a liquid coolant and a pump circulating the coolant through the fuel cell and a heat exchanger that extracts heat from the coolant. Improved efficiency is achieved by intermittently shutting off the pump when the fuel cell is operating at less than 25% of its “full power” design point.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: July 20, 2004
    Assignee: General Motors Corporation
    Inventor: Martin Monroe Hoch
  • Intermittent cooling of fuel cell
    Publication number: 20030152816
    Abstract: Process for improving the efficiency of a fuel cell system having a liquid coolant and a pump circulating the coolant through the fuel cell and a heat exchanger that extracts heat from the coolant. Improved efficiency is achieved by intermittently shutting off the pump when the fuel cell is operating at less than 25% of its “full power” design point.
    Type: Application
    Filed: February 13, 2002
    Publication date: August 14, 2003
    Inventor: Martin Monroe Hoch
  • Water injected fuel cell system compressor
    Patent number: 6268074
    Abstract: A fuel cell system including a dry compressor for pressurizing air supplied to the cathode side of the fuel cell. An injector sprays a controlled amount of water on to the compressor's rotor(s) to improve the energy efficiency of the compressor. The amount of water sprayed out the rotor(s) is controlled relative to the mass flow rate of air inputted to the compressor.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: July 31, 2001
    Assignee: General Motors Corporation
    Inventors: James S. Siepierski, Barbara S. Moore, Martin Monroe Hoch