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: 7143674
    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: September 30, 2002
    Date of Patent: December 5, 2006
    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: 20060240244
    Abstract: A method of forming a sheet comprising extruding a polymer material comprising an incompatible material and a foaming agent, cooling the extruded material, stretching said extruded material in at least one direction.
    Type: Application
    Filed: June 27, 2006
    Publication date: October 26, 2006
    Inventors: Suresh Sunderrajan, Narasimharao Dontula, Thaddeus Gula, William Mruk, Sandra Dagan, Peter Aylward, Richard Bomba, Terry Heath, Edward Colombo
  • Publication number: 20060222789
    Abstract: An inkjet recording element comprising a support coated with an immiscible polymer blend to overcome limitations of existing hydrophilic materials for extrusion coating. The two phases correspond, respectively to a first composition comprising a hydrophobic thermoplastic polymer such as a polyolefin, which does not absorb water, and a second composition comprising a hydrophilic thermoplastic polymer, for example, polyvinyl alcohol, modified ethyl vinyl alcohol, polyether block polyamide, or the like. The characteristics of the polymers are such that hydrophilic thermoplastic polymer encapsulates the polyethylene layer during extrusion and produces a swellable inkjet receiver layer. Also disclosed are methods for making and a method of printing on such inkjet recording elements.
    Type: Application
    Filed: April 5, 2005
    Publication date: October 5, 2006
    Inventors: Narasimharao Dontula, Cheryl Brickey, Thomas Dannhauser, Sharon Girolmo, Steven Neerbasch
  • Publication number: 20060115664
    Abstract: The invention relates to a toner receiver member comprising a base, at least one tie layer adjacent to said base, and at least one toner receiver layer adjacent said at least one tie layer on the side opposite to the base, wherein said at least one toner receiver layer comprises a layer of branched polyester or a mixture of styrene acrylate copolymer with an ethylene methacrylate copolymer or with a low density polyethylene.
    Type: Application
    Filed: November 30, 2004
    Publication date: June 1, 2006
    Inventors: Narasimharao Dontula, Terry Heath, Charles Bauer, Michael Brickey, Jeffrey Gillmor, Teh-Ming Kung
  • Publication number: 20060115627
    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: Application
    Filed: November 30, 2004
    Publication date: June 1, 2006
    Inventors: Narasimharao Dontula, Terry Heath, Michael Brickey, Mridula Nair
  • Patent number: 7037634
    Abstract: The present invention relates to an imaging element comprising at least one imaging layer and a base. The base comprises a foam core layer, which comprises a polymer that has been expanded through the use of a blowing agent, and at least one polymeric surface smoothing layer, which comprises a solution polymer.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: May 2, 2006
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Narasimharao Dontula
  • Patent number: 7033723
    Abstract: The present invention relates to an imaging element comprising an imaging layer and a support, wherein the support comprises a core layer having a surface roughness of at least 1.4 microns and a pit camouflaging flange layer between the support and the imaging layer. The present invention also relates to a method of forming an imaging support comprising extruding a polymer layer onto a core layer of surface roughness of at least 1.4 microns, and passing the extruded polymer layer on the core layer between two temperature controlled rollers, one of which comprises a pit camouflaging surface and a method of forming an imaging support comprising extruding a polymer layer, passing the extruded polymer layer between two temperature controlled rollers, one of which comprises a pit camouflaging surface, and laminating the polymer layer onto a core layer with a surface roughness of at least 1.4 microns.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: April 25, 2006
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Narasimharao Dontula, Sandra J. Dagan, Thaddeus S. Gula, Terry A. Heath
  • Patent number: 6958860
    Abstract: Disclosed is an optical element comprising a polymer film containing a dispersion of minute layered particulates and microvoids.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: October 25, 2005
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Debasis Majumdar, Robert P. Bourdelais, Cheryl J. Kaminsky, Michael R. Brickey, Thomas M. Laney
  • Patent number: 6958365
    Abstract: The present invention relates to a method for making an open celled microcellular foam comprising providing at least one foamable polymer and a crosslinking agent in an extruder, injecting at least one blowing agent into said at least one foamable polymer and said crosslinking agent in said extruder, blending said blowing agent injected into said at least one foamable polymer and said crosslinking agent in said extruder, feeding said blended blowing agent, at least one foamable polymer and said crosslinking agent in said extruder to a die, and depressurizing said blended blowing agent, said at least one foamable polymer and said crosslinking agent.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: October 25, 2005
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Jehuda Greener, Cathy A. Fleischer, Chul B. Park, Patrick C. Lee, Jin Wang, Hani E. Naguib
  • Publication number: 20050233241
    Abstract: The present invention relates to a method for placing indicia on the non-image side of a support for an imaging element comprising providing a support, which has an image side having at least one imaging layer and a non-image side, contacting the non-image side of the support with a thermal transfer donating sheet, applying energy in a pattern to the thermal transfer dye donating sheet, and transferring the pattern to the non-image side of the support to form indicia.
    Type: Application
    Filed: April 19, 2004
    Publication date: October 20, 2005
    Inventors: Peter Aylward, James Honan, Narasimharao Dontula
  • Publication number: 20050224418
    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: Application
    Filed: November 10, 2004
    Publication date: October 13, 2005
    Inventors: David Patton, Joseph Bringley, Richard Wien, John Pochan, Yannick Lerat, Narasimharao Dontula
  • Publication number: 20050227016
    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: Application
    Filed: November 10, 2004
    Publication date: October 13, 2005
    Inventors: David Patton, Joseph Bringley, Richard Wien, John Pochan, Yannick Lerat, Narasimharao Dontula
  • Publication number: 20050191568
    Abstract: The present invention relates to an imaging element comprising an imaging layer and a support, wherein the support comprises a core layer having a surface roughness of at least 1.4 microns and a pit camouflaging flange layer between the support and the imaging layer. The present invention also relates to a method of forming an imaging support comprising extruding a polymer layer onto a core layer of surface roughness of at least 1.4 microns, and passing the extruded polymer layer on the core layer between two temperature controlled rollers, one of which comprises a pit camouflaging surface and a method of forming an imaging support comprising extruding a polymer layer, passing the extruded polymer layer between two temperature controlled rollers, one of which comprises a pit camouflaging surface, and laminating the polymer layer onto a core layer with a surface roughness of at least 1.4 microns.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 1, 2005
    Inventors: Peter Aylward, Narasimharao Dontula, Sandra Dagan, Thaddeus Gula, Terry Heath
  • Publication number: 20050191569
    Abstract: The present invention relates to an imaging element comprising at least one imaging layer and a base. The base comprises a foam core layer, which comprises a polymer that has been expanded through the use of a blowing agent, and at least one polymeric surface smoothing layer, which comprises a solution polymer.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 1, 2005
    Inventors: Peter Aylward, Narasimharao Dontula
  • Publication number: 20050181196
    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: Application
    Filed: February 17, 2004
    Publication date: August 18, 2005
    Inventors: Peter Aylward, Narasimharao Dontula, Terry Heath, Richard Bomba, John Benson
  • Publication number: 20050176836
    Abstract: The present invention relates to a method for making an open celled microcellular foam comprising providing at least one foamable polymer and a crosslinking agent in an extruder, injecting at least one blowing agent into said at least one foamable polymer and said crosslinking agent in said extruder, blending said blowing agent injected into said at least one foamable polymer and said crosslinking agent in said extruder, feeding said blended blowing agent, at least one foamable polymer and said crosslinking agent in said extruder to a die, and depressurizing said blended blowing agent, said at least one foamable polymer and said crosslinking agent.
    Type: Application
    Filed: March 4, 2005
    Publication date: August 11, 2005
    Inventors: Narasimharao Dontula, Jehuda Greener, Cathy Fleischer, Chul Park, Patrick Lee, Jin Wang, Hani Naguib
  • Publication number: 20050103430
    Abstract: A method is described for splicing together overlapping ends of first and second lengths of photographic film strips of common film strip width, comprising positioning a bonding element between an overlapping end of the first length of photographic film and a corresponding overlapped end of the second length of photographic film, and heating the bonding element to effect an adhesive bond between such film ends, wherein the bonding element comprises an induction heating receptive support and thermoplastic adhesive layers on each side of the support, and wherein the heating of the bonding element is performed by induction heating. The present invention allows for the preparation of photographic film splices, consisting of either homogeneous or dissimilar film bases, using a bonding element and induction heating to provide smooth yet strong splices. In particular, the invention enables successful splicing of acetate support (e.g., cellulose triacetate (CTA)) based films and polyester support (e.g.
    Type: Application
    Filed: November 18, 2003
    Publication date: May 19, 2005
    Inventors: Thomas Smith, Brian Johnston, Narasimharao Dontula, Luba Kordovski
  • Patent number: 6887328
    Abstract: A method is described for splicing together overlapping ends of first and second lengths of photographic film strips of common film strip width, comprising positioning a bonding element between an overlapping end of the first length of photographic film and a corresponding overlapped end of the second length of photographic film, and heating the bonding element to effect an adhesive bond between such film ends, wherein the bonding element comprises an induction heating receptive support and thermoplastic adhesive layers on each side of the support, and wherein the heating of the bonding element is performed by induction heating. The present invention allows for the preparation of photographic film splices, consisting of either homogeneous or dissimilar film bases, using a bonding element and induction heating to provide smooth yet strong splices. In particular, the invention enables successful splicing of acetate support (e.g., cellulose triacetate (CTA)) based films and polyester support (e.g.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: May 3, 2005
    Assignee: Eastman Kodak Company
    Inventors: Thomas M. Smith, Brian H. Johnston, Narasimharao Dontula, Luba Kordovski
  • Patent number: 6888663
    Abstract: The invention relates to an optical component comprising a dispersion of layered minute particulate materials in a binder, the layered materials having a layer thickness, a concentration of particulate in the binder, and a basal plane spacing sufficient to provide a component having a light transmissivity of at least 50%.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: May 3, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert P. Bourdelais, Narasimharao Dontula, Debasis Majumdar, Cheryl J. Kaminsky
  • Patent number: 6844047
    Abstract: Disclosed is an optical element comprising substrate with a surface feature having a roughness average (Ra) of from 1 to 200 micrometers containing a dispersion of minute layered particulates in a polymer binder.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: January 18, 2005
    Assignee: Eastman Kodak Company
    Inventors: Cheryl J. Kaminsky, Narasimharao Dontula, Debasis Majumdar, Robert P. Bourdelais