Patents by Inventor Lee J. Duvall

Lee J. Duvall 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).

  • Removal and recovery of sulfur dioxide from stack gases
    Patent number: 4153437
    Abstract: An improved method and apparatus for the removal and recovery of sulfur dioxide and water vapor from gaseous effluent is disclosed. Sulfur dioxide and water vapor entrained in stack gases, emanated upon combustion of sulfur-bearing materials, are selectively liquefied under the combined influence of a reduction in temperature to about 1.degree. C. and an increase in pressure in the range of 2 inches of water gauge [WG] to about 100 psig of the gaseous effluent. System efficiency is enhanced through proper routing of effluent gases and condensate and the incorporation of a condensate spray curtain.
    Type: Grant
    Filed: November 28, 1977
    Date of Patent: May 8, 1979
    Inventor: Lee J. Duvall
  • Removal and recovery of sulfur dioxide from stack gases
    Patent number: 4078390
    Abstract: An improved method and apparatus for the removal and recovery of sulfur dioxide and water vapor from gaseous effluent is disclosed. Sulfur dioxide and water vapor entrained in stack gases, emanated upon combustion of sulfur-bearing materials, are selectively liquefied under the combined influence of a reduction in temperature and an increase in pressure of the gaseous effluent. System efficiency is enhanced through proper routing of effluent gases and condensate and the incorporation of a condensate spray curtain.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: March 14, 1978
    Inventor: Lee J. Duvall
  • Removal and recovery of sulfur dioxide from stack gases
    Patent number: 3994706
    Abstract: A method and apparatus for the removal and recovery of sulfur dioxide from gaseous effluent is disclosed. Sulfur dioxide entrained in stack gases, emanated upon combustion of sulfur-bearing materials, is selectively liquefied under the combined influence of a reduction in temperature and an increase in pressure of the gaseous effluent.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: November 30, 1976
    Inventor: Lee J. Duvall