Patents by Inventor Srikanth Varanasi

Srikanth Varanasi 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: 6858306
    Abstract: A glass article having a solar control coating is disclosed for use in producing heat reducing glass especially for use in architectural windows. The coated article includes a glass substrate, a coating of an antimony doped tin oxide deposited on and adhering to the glass substrate and a coating of fluorine doped tin oxide deposited on and adhering to the surface of the coating of antimony doped tin oxide. The low emittance of the coated glass article, when combined with the surprisingly selective solar absorption of the multilayer stack provides improved heat rejection in summer and heat retention in winter, while permitting the transmittance of a relatively high degree of visible light.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: February 22, 2005
    Assignees: Pilkington North America Inc., Pilkington PLC
    Inventors: David A. Strickler, Kevin D. Sanderson, Srikanth Varanasi, Ronald D. Goodman
  • Publication number: 20050003644
    Abstract: Nitrogen doped titanium oxide coatings on a hot glass substrate are prepared by providing a uniform vaporized reactant mixture containing a titanium compound, a nitrogen compound and an oxygen-containing compound, and delivering the reactant mixture to the surface of a ribbon of hot glass, where the compounds react to form a nitrogen doped titanium oxide coating. The nitrogen doped titanium oxide coatings deposited in accordance with the invention demonstrate an increase in visible light absorption.
    Type: Application
    Filed: April 15, 2004
    Publication date: January 6, 2005
    Inventors: Michael Remington, Srikanth Varanasi, David Strickler
  • Patent number: 6838178
    Abstract: A color neutral absorbing film is applied as a coating on a glass substrate, to which a conductive coating is first applied. An additional metal oxide layer is deposited on the absorbing film. The coating is suitable for use in anti-reflective coatings containing other metal oxides or mixed metal oxides to achieve a coated glass article having a visible light transmittance of 30% or greater and a reflectance of less than 5%. The coated glass article is absorbing, anti-reflective and conducting.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: January 4, 2005
    Assignees: Libbey-Owens-Ford Co., Pilkington PLC
    Inventors: David A. Strickler, Kevin Sanderson, Srikanth Varanasi, Ronald D. Goodman
  • Patent number: 6827970
    Abstract: A niobium doped tin oxide coating is applied onto a glass substrate to produce a low emissivity (low E) glass. The coating can optionally be doped with both niobium and other dopant(s), such as fluorine. The low emissivity glass has properties comparable or superior to conventional low E glass with fluorine doped tin oxide coatings.
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: December 7, 2004
    Assignee: Pilkington North America, Inc.
    Inventors: Srikanth Varanasi, David A. Strickler, Kevin Sanderson
  • Publication number: 20030152711
    Abstract: A niobium doped tin oxide coating is applied onto a glass substrate to produce a low emissivity (low E) glass. The coating can optionally be doped with both niobium and other dopant(s), such as fluorine. The low emissivity glass has properties comparable or superior to conventional low E glass with fluorine doped tin oxide coatings.
    Type: Application
    Filed: February 10, 2003
    Publication date: August 14, 2003
    Inventors: Srikanth Varanasi, David A. Strickler, Kevin Sanderson
  • Patent number: 6524647
    Abstract: A niobium doped tin oxide coating is applied onto a glass substrate to produce a low emissivity (low E) glass. The coating can optionally be doped with both niobium and other dopant(s), such as fluorine. The low emissivity glass has properties comparable or superior to conventional low E glass with fluorine doped tin oxide coatings.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: February 25, 2003
    Assignee: Pilkington plc
    Inventors: Srikanth Varanasi, David A. Strickler, Kevin Sanderson
  • Patent number: 6207284
    Abstract: Silicate based glass compositions with nitrogen compounds are included in the composition as performance modifiers to impart desirable color and improved energy absorbance properties. The nitrogen compound is, generally, a metal nitride which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting the composition and method resulting in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: March 27, 2001
    Assignee: Libben-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Paige L. Higby, Gwendolyn A. Young
  • Patent number: 6196027
    Abstract: The invention is a method of making silicate based glass compositions with phosphorus compounds included in the composition as spectral modifiers to impart desirable color and improved energy absorbance properties. The phosphorus compound is generally a metal phosphide which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: March 6, 2001
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Michael B. Purvis, Paige L. Higby, Kevin V. Goodwin, Gwendolyn A. Young
  • Patent number: 6191059
    Abstract: Silicate based glass compositions with metal silicide compounds included in the composition as performance modifiers to impart desirable color and improved energy absorbance properties. The metal silicides are added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: February 20, 2001
    Assignee: Libbey-Owens-Ford Co.
    Inventor: Srikanth Varanasi
  • Patent number: 6133176
    Abstract: Silicate based glass compositions with boron compounds are included in the composition as performance modifiers to impart desirable color and improved energy absorbance properties. The boron compound is, generally, a metal boride which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting the composition and method resulting in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: October 17, 2000
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Paige L. Higby, Gwendolyn A. Young
  • Patent number: 6110583
    Abstract: Silicate based glass compositions with phosphorus compounds included in the composition as spectral modifiers to impart desirable color and improved energy absorbance properties are disclosed. The phosphorus compound is generally a metal phosphide which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: August 29, 2000
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Michael B. Purvis, Paige L. Higby, Kevin V. Goodwin, Gwendolyn A. Young
  • Patent number: 6001753
    Abstract: Silicate based glass compositions with phosphorus compounds included in the composition as spectral modifiers to impart desirable color and improved energy absorbance properties. The phosphorus compound is generally a metal phosphide which is added to the batch glass composition in amounts greater than 0.05 weight percent prior to melting. The composition and method result in a finished glass suitable for use in architectural and automotive glazings.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: December 14, 1999
    Assignee: Libbey-Owens-Ford Co.
    Inventors: Srikanth Varanasi, Michael B. Purvis, Paige L. Higby, Kevin V. Goodwin, Gwendolyn A. Young