Patents by Inventor David John Spiers

David John Spiers 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).

  • Method and equipment for prevention of cooling of electrochemical devices
    Patent number: 5789092
    Abstract: The invention concerns a method and an equipment for prevention of cooling of electrochemical devices (10). The temperature of the electrochemical device (10) is measured and, as the temperature falls below a certain preset lower limit (T.sub.minimum), an additional load (17), which is at least high enough so that the electric current that it produces heats the electrochemical device (10), is connected to the device. The additional load (17) is disconnected from the electrochemical device (10) as the temperature has reached a certain preset upper limit (T.sub.maximum).
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: August 4, 1998
    Assignee: Neste Oy
    Inventors: David John Spiers, Jyrki Rainer Leppanen