Patents by Inventor Narasimharao Dontula

Narasimharao Dontula 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: 7678445
    Abstract: The invention relates to a receiver sheet for electrophotography comprising a base material having thereon at least one toner receiver layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured Tg of said at least one receiver layer is less than 5° C.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: March 16, 2010
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Terry A. Heath, Michael R. Brickey, Mridula Nair
  • Patent number: 7632562
    Abstract: The invention relates to a printing media comprising a first side comprising a first exposed layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured Tg of said exposed layer comprises a Tg of less than 5° C. and a second side comprising an a second exposed layer having an advancing contact angle with water of less than 90°.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: December 15, 2009
    Assignee: Eastman Kodak Company
    Inventors: Mridula Nair, Narasimharao Dontula, Michael R. Brickey, Terry A. Heath, Joseph W. Hoff, Tamara K. Jones, Daniel M. Leusch, Joseph S. Sedita, Cumar Sreekumar, Dinesh Tyagi
  • Patent number: 7585557
    Abstract: The invention relates to a base comprising a closed cell foam core sheet having a closed cell foam layer with a density gradient between the center of the core and the surfaces of the core. The invention also relates to a method of making such a base by adding a first concentration of a first blowing agent to a first polymer to form a first mixture, adding a second concentration of a second blowing agent to a second polymer to form a second mixture, and extruding the mixtures to form the closed cell foam core sheet. The invention also relates to a method of making such a closed cell foam core sheet base comprising the steps of adding a blowing agent to a polymer to form a mixture, melting the mixture, extruding the mixture from a die, and rapidly quenching the mixture against a high heat transfer surface.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: September 8, 2009
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Narasimharao Dontula, Terry A. Heath, Richard D. Bomba, John E. Benson
  • Patent number: 7579396
    Abstract: A polymer composite comprising a thermoplastic polymer compounded with a phenolic antioxidant, an organo-disulfide antioxidant, and a silver-based antimicrobial agent. The specified combination of antioxidant stabilizers is superior in inhibiting undesirable discoloration of thermoplastic polymers in the presence of compounded silver-based antimicrobial agents. A process of preparing such a composite, comprising compounding the phenolic antioxidant and organo-disulfide antioxidant with the thermoplastic polymer prior to compounding the silver-based antimicrobial agent with the thermoplastic polymer.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: August 25, 2009
    Assignee: Eastman Kodak Company
    Inventors: Thomas N. Blanton, Narasimharao Dontula, Seshadri Jagannathan, Kevin L. Bishop, David W. Sandford, Craig L. Barnes
  • Publication number: 20090162580
    Abstract: The present invention relates to an image receiver element comprising a single low density layer, wherein the single low density layer comprises non-crosslinked aliphatic polyester containing non-interconnected void space, and wherein the single low density layer does not absorb more than 3 weight % moisture at 80% RH and 21.3° C. as compared to the weight % moisture of said single low density layer at 20% RH and 21.3° C. The invention relates to a method of forming such an image receiver element, a printing system comprising an imaging material and the image receiver element, and a method of printing comprising obtaining an imaging material comprising a colorant layer; obtaining the image receiver element; superposing the colorant layer with the receiver element; and transferring colorant from the imaging material to the image receiver element.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 25, 2009
    Inventors: Narasimharao Dontula, Somsack Chang, Richard D. Bomba, Terry A. Heath
  • Patent number: 7521173
    Abstract: The present invention relates to an extruded imaging element comprising an extruded support bearing an extruded image receiving layer and an extruded antistatic tie layer between the extruded support and the extruded image receiving layer, wherein the extruded tie layer absorbs less than 3 weight % of moisture at 80% RH and 70 F (22.78° C.) comprises 5-30% polyether-containing antistatic material in a matrix polymer, and a method for making the same.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: April 21, 2009
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Terry A. Heath, Somsack Chang
  • Patent number: 7449287
    Abstract: The present invention relates to a support and an imaging element utilizing the support, wherein the support comprises at least one nacreous resin layer, wherein the uppermost layer comprises nacreous pigment in a polyolefin matrix polymer, and wherein the FLOP value of the imaging element, and, hence, the support, is greater than 25. Also included is a method of making the nacreous support.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: November 11, 2008
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Terry A. Heath, Peter G. Evans
  • Publication number: 20080220190
    Abstract: The present invention relates to an image recording element comprising a support having thereon an aqueous subbing layer and an extruded dye receiving layer, wherein the image recording element is a thermal dye receiver. The present invention also relates to a method of making a thermal dye receiving element comprising providing a support for an imaging element; applying an aqueous subbing layer to the support; and extruding thereon at least one thermal dye receiving layer.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 11, 2008
    Inventors: Debasis Majumdar, Narasimharao Dontula
  • Publication number: 20080220353
    Abstract: The present invention relates to an extruded imaging element comprising an extruded support bearing an extruded image receiving layer and an extruded antistatic tie layer between the extruded support and the extruded image receiving layer, wherein the extruded tie layer absorbs less than 3 weight % of moisture at 80% RH and 70 F (22.78° C.) comprises 5-30% polyether-containing antistatic material in a matrix polymer, and a method for making the same.
    Type: Application
    Filed: March 8, 2007
    Publication date: September 11, 2008
    Inventors: Narasimharao Dontula, Terry A. Heath, Somsack Chang
  • Publication number: 20080181969
    Abstract: A polymer composite comprising a thermoplastic polymer compounded with a phenolic antioxidant, an organo-disulfide antioxidant, and a silver-based antimicrobial agent. The specified combination of antioxidant stabilizers is superior in inhibiting undesirable discoloration of thermoplastic polymers in the presence of compounded silver-based antimicrobial agents. A process of preparing such a composite, comprising compounding the phenolic antioxidant and organo-disulfide antioxidant with the thermoplastic polymer prior to compounding the silver-based antimicrobial agent with the thermoplastic polymer.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Inventors: Thomas N. Blanton, Narasimharao Dontula, Seshadri Jagannathan, Kevin L. Bishop, David W. Sandford, Craig L. Barnes
  • Patent number: 7381334
    Abstract: A method for making a web having a metal-ion sequestering agent and treating a liquid using the web. The method of making the web includes electrostatically providing at least one metal-ion sequestering agent and/or antimicrobial agent. The web can be used to tread a liquid by placing the web into a tank and subjecting the liquid to the web.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: June 3, 2008
    Assignee: Eastman Kodak Company
    Inventors: David L. Patton, Joseph F. Bringley, Richard W. Wien, John M. Pochan, Yannick J. F. Lerat, Narasimharao Dontula
  • Patent number: 7347946
    Abstract: A method for inhibiting growth of microbes in a liquid having a pH equal to or greater than about 2.5 by using a filter bed assembly or filter for filtering the liquid having a metal-ion sequestering agent for removing designated metal ion from the liquid. The liquid is passed through the filter bed or filter for a sufficient time so as to substantially reduce the designated metal ion from the liquid.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: March 25, 2008
    Assignee: Eastman Kodak Company
    Inventors: David L. Patton, Joseph F. Bringley, Richard W. Wien, John M. Pochan, Yannick J. F. Lerat, Narasimharao Dontula
  • Patent number: 7323285
    Abstract: A thermal donor element having a dye layer on an extruded substrate, wherein the extruded substrate includes a polyester-containing material and a slip agent, but does not contain silica particles, is disclosed.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: January 29, 2008
    Assignee: Eastman Kodak Company
    Inventors: David G. Foster, Narasimharao Dontula, Maurice L. Gray, William H. Simpson
  • Publication number: 20070212527
    Abstract: The invention relates to a receiver sheet for electrophotography comprising a base material having thereon at least one toner receiver layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured Tg of said at least one receiver layer is less than 5° C.
    Type: Application
    Filed: May 14, 2007
    Publication date: September 13, 2007
    Inventors: Narasimharao Dontula, Terry Heath, Michael Brickey, Mridula Nair
  • Patent number: 7264867
    Abstract: The invention relates to a receiver sheet for electrophotography comprising a base material having thereon at least one toner receiver layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured Tg of said at least one receiver layer comprises a Tg of less than 5° C.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: September 4, 2007
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Terry A. Heath, Michael R. Brickey, Mridula Nair
  • Publication number: 20070111133
    Abstract: A thermal donor element having a dye layer on an extruded substrate, wherein the extruded substrate includes a polyester-containing material and a slip agent, but does not contain silica particles, is disclosed.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 17, 2007
    Inventors: David Foster, Narasimharao Dontula, Maurice Gray, William Simpson
  • Publication number: 20070054070
    Abstract: An inkjet recording element comprising a support extrusion coated with a porous hydrophilic material. The composition comprises a hydrophilic thermoplastic polymer and blends thereof. Also disclosed are methods for making and a method of printing on the inkjet recording element.
    Type: Application
    Filed: August 23, 2005
    Publication date: March 8, 2007
    Inventors: Thomas Laney, Narasimharao Dontula, Kenneth Best
  • Patent number: 7179523
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, wherein said foam core sheet has a modulus of between 100 and 2758 MPa and a tensile toughness between 0.344 and 35 MPa, and wherein said upper and lower flange sheet has a modulus of between and 1380 and 20000 MPa and a toughness between 1.4 and 210 MPa.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: February 20, 2007
    Assignee: Eastman Kodak Company
    Inventors: Yeh-Hung Lai, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk, Narasimharao Dontula, Gary D. Smith, YuanQiao Rao
  • Publication number: 20070031615
    Abstract: The invention relates to a printing media comprising a first side comprising a first exposed layer comprising a mixture of polyolefin and at least one member selected from the group consisting of polyolefin copolymers, amide containing polymers, and ester containing polymers, wherein a measured Tg of said exposed layer comprises a Tg of less than 5° C. and a second side comprising an a second exposed layer having an advancing contact angle with water of less than 90°.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 8, 2007
    Inventors: Mridula Nair, Narasimharao Dontula, Michael Brickey, Terry Heath, Joseph Hoff, Tamara Jones, Daniel Leusch, Joseph Sedita, Cumar Sreekumar, Dinesh Tyagi
  • Patent number: 7166656
    Abstract: The present invention describes an intercalated clay intercalated with a polyether block polyamide copolymer. An article is included comprising a matrix polymer and an intercalated clay comprising clay intercalated with polyether block polyamide copolymer. The present invention also includes an article comprising polyether block polyamide copolymer and intercalated clay.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 23, 2007
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Narasimharao Dontula, Thomas N. Blanton, Gary S. Freedman