Patents Assigned to Stone International Limited
  • Boiler and method of heating liquid
    Patent number: 4528945
    Abstract: In a tube boiler, fuel is burned in a fluidized bed which has a shallower part and a deeper part. The tubes extend only through the shallower part which can be fluidized independently of the deeper part so that the rate of heat transfer from the bed to the tubes can be varied according to demand. Water flows through specially configurated, upwardly oriented tubes by natural convection. There is also a general circulation of particles within the bed.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: July 16, 1985
    Assignee: Stone International Limited
    Inventors: Michael J. Virr, Richard Burrows
  • Facade for a building element
    Patent number: D513808
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: January 24, 2006
    Assignee: Stone International Limited
    Inventor: Paul Francis Zwaan