Patents by Inventor Penelope Stamatakis

Penelope Stamatakis 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).

  • Patent number: 7815881
    Abstract: Disclosed are a process and apparatus for selective catalytic reduction of NOx. The process is enabled by bypassing a heat exchanger section, such as an economizer, of the boiler in advance of an SCR unit at low load conditions to enable NOx reduction even at low loads using urea instead of ammonia. In a preferred form, under high load conditions, the bypass can be almost fully closed and the economizer can be operated normally without excessively cooling the combustion gases, using only a portion of bypassed gases which are hot enough to decompose the urea into its active components including ammonia.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: October 19, 2010
    Assignee: Fuel Tech, Inc.
    Inventors: M. Linda Lin, William H. Sun, John M. Boyle, Penelope Stamatakis
  • Publication number: 20100055014
    Abstract: Disclosed are a process and apparatus for selective catalytic reduction of NOx. The process is enabled by bypassing a heat exchanger section, such as an economizer, of the boiler in advance of an SCR unit at low load conditions to enable NOx reduction even at low loads using urea instead of ammonia. In a preferred form, under high load conditions, the bypass can be almost fully closed and the economizer can be operated normally without excessively cooling the combustion gases, using only a portion of bypassed gases which are hot enough to decompose the urea into its active components including ammonia.
    Type: Application
    Filed: November 10, 2009
    Publication date: March 4, 2010
    Applicant: FUEL TECH, INC.
    Inventors: M. Linda Lin, William H. Sun, John M. Boyle, Penelope Stamatakis
  • Patent number: 7615200
    Abstract: Disclosed are a process and apparatus for selective catalytic reduction of NOx. The process is enabled by passing a heat exchanger section, such as an economizer, of the boiler in advance of an SCR unit at low load conditions to enable NOx reduction even at low loads using urea instead of ammonia. In a preferred form, under high load conditions, the bypass can be almost fully closed and the economizer can be operated normally without excessively cooling the combustion gases, using only a portion of bypassed gases which are hot enough to decompose the urea into its active components including ammonia.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: November 10, 2009
    Assignee: Fuel Tech, Inc.
    Inventors: M. Linda Lin, William H. Sun, John M. Boyle, Penelope Stamatakis
  • Publication number: 20070231232
    Abstract: Disclosed are a process and apparatus for selective catalytic reduction of NOx. The process is enabled by passing a heat exchanger section, such as an economizer, of the boiler in advance of an SCR unit at low load conditions to enable NOx reduction even at low loads using urea instead of ammonia. In a preferred form, under high load conditions, the bypass can be almost fully closed and the economizer can be operated normally without excessively cooling the combustion gases, using only a portion of bypassed gases which are hot enough to decompose the urea into its active components including ammonia.
    Type: Application
    Filed: April 3, 2007
    Publication date: October 4, 2007
    Applicant: FUEL TECH, INC.
    Inventors: M. Lin, William Sun, John Boyle, Penelope Stamatakis
  • Patent number: 5571855
    Abstract: Improved methods and polymer compositions are provided whereby ultraviolet radiation degradation of substrates formed of the compositions is attenuated.In accordance with the invention, ultraviolet scattering and absorbing particles having a particle size in the range of from about 0.001 micrometer to about 0.20 micrometer in diameter are dispersed in at least a surface layer of a polymer substrate.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: November 5, 1996
    Assignee: Kerr-McGee Corporation
    Inventors: Bruce R. Palmer, James W. Kauffman, Penelope Stamatakis
  • Patent number: 5504134
    Abstract: Improved methods and polymer compositions are provided whereby ultraviolet radiation degradation of substrates formed of the compositions is attenuated. In accordance with the invention, ultraviolet scattering and absorbing particles having a particle size in the range of from about 0.001 micrometer to about 0.20 micrometer in diameter are dispersed in at least a surface layer of a polymer substrate.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: April 2, 1996
    Assignee: Kerr-McGee Chemical Corporation
    Inventors: Bruce R. Palmer, James W. Kauffman, Penelope Stamatakis
  • Patent number: 5352725
    Abstract: Improved methods and polymer compositions are provided whereby ultraviolet radiation degradation of substrates formed of the compositions is attenuated. In accordance with the invention, ultraviolet scattering and absorbing particles having a particle size in the range of from about 0.001 micrometer to about 0.20 micrometer in diameter are dispersed in at least a surface layer of a polymer substrate.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: October 4, 1994
    Assignee: Kerr-McGee Chemical Corporation
    Inventors: Bruce R. Palmer, James W. Kauffman, Penelope Stamatakis
  • Patent number: 5278208
    Abstract: A colloidal sulfur particle opacifying extender scatters light across the visible spectrum to result in an overall colorless appearance. A process for opacifying and extending a matrix which can be a water-borne emulsion or a coating, using the colloidal sulfur particles, and opacified and extended water-borne emulsions and coatings including the colloidal sulfur particles are also provided.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: January 11, 1994
    Assignee: Kerr-McGee Chemical Corporation
    Inventors: Bruce R. Palmer, Penelope Stamatakis
  • Patent number: 5264031
    Abstract: A colloidal sulfur particle opacifying extender scatters light across the visible spectrum to result in an overall colorless appearance. A process for opacifying and extending a matrix which can be a water-borne emulsion or a coating, using the colloidal sulfur particles, and opacified and extended water-borne emulsions and coatings including the colloidal sulfur particles are also provided.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: November 23, 1993
    Assignee: Kerr-McGee Chemical Corporation
    Inventors: Bruce P. Palmer, Penelope Stamatakis