Patents by Inventor Rajesh V. Mehta

Rajesh V. Mehta 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: 6843556
    Abstract: A system (10) produces patterned deposition on a substrate (14) from compressed fluids. A delivery system (12) cooperates with an independently controlled first chamber and an independently controlled second chamber retaining a substrate (14) for receiving precipitated functional material along a fluid flow delivery (13) from the delivery system (12). A shadow mask (22) is arranged in close proximity to the substrate (14) for forming the patterned deposition on the substrate (14).
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: January 18, 2005
    Assignee: Eastman Kodak Company
    Inventors: David J. Nelson, Suresh Sunderrajan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Jr., Sridhar Sadasivan, Rajesh V. Mehta, John E. Rueping
  • Publication number: 20040265478
    Abstract: An apparatus and method of color tuning a light emitting display are provided. The apparatus includes a source of a mixture of a compressed fluid solvent and an organic material. A discharge device is positioned in fluid communication with the source of the mixture of the compressed fluid and the organic material. A condition controlling device is positioned in fluid communication between the source and the discharge device. The method includes providing a substrate, providing a first addressing electrode on the substrate, controllably depositing an organic nanomorphic material over the first addressing electrode, and providing a second addressing electrode over the organic nanomorphic material.
    Type: Application
    Filed: June 24, 2003
    Publication date: December 30, 2004
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, David J. Nelson, Rajesh V. Mehta, Glen C. Irvin, Thomas N. Blanton, Robert S. Cupello
  • Publication number: 20040265622
    Abstract: A light emitting display is provided. The light emitting display includes a first addressing electrode and a second addressing electrode. A nanomorphic material layer can be positioned between the first addressing electrode and the second addressing electrode. Alternatively, a material can be positioned between the first addressing electrode and the second addressing electrode with the material luminescing at a plurality of wavelengths.
    Type: Application
    Filed: June 24, 2003
    Publication date: December 30, 2004
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, David J. Nelson, Rajesh V. Mehta, Glen C. Irvin
  • Publication number: 20040263597
    Abstract: An apparatus and method of producing multiple spectral reflectance deposits from a mixture of a compressed fluid and a marking material are provided. The method includes providing a receiver; controllably depositing a marking material on the receiver by delivering a mixture of a compressed fluid solvent and the marking material toward the receiver, the mixture being contained under a first condition prior to delivery toward the receiver, the marking material becoming free of the compressed fluid solvent prior to reaching the receiver; and controllably depositing the marking material on the receiver by delivering the mixture of the compressed fluid solvent and the marking material toward the receiver, the mixture being contained under a second condition prior to delivery toward the receiver, the marking material becoming free of the compressed fluid solvent prior to reaching the receiver, the second condition being distinct from the first condition.
    Type: Application
    Filed: June 24, 2003
    Publication date: December 30, 2004
    Applicant: Eastman Kodak Company
    Inventors: David J. Nelson, Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Rajesh V. Mehta
  • Patent number: 6790483
    Abstract: A method produces patterned deposition on a substrate (14) from compressed fluid. A delivery system (12) cooperates with a controlled environment (30, 100, 200) retaining a substrate (14) for receiving precipitated functional material 44 along a fluid delivery path (13) from the delivery system (12). A mask (22) is arranged in close proximity to the substrate (14) for forming the patterned deposition on the substrate (14).
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: September 14, 2004
    Assignee: Eastman Kodak Company
    Inventors: Ramesh Jagannathan, Suresh Sunderrajan, Seshadri Jagannathan, Glen C. Irvin, Jr., Sridhar Sadasivan, David J. Nelson, Rajesh V. Mehta, John E. Rueping
  • Patent number: 6780249
    Abstract: A system (10) produces patterned deposition on a substrate (14) from supercritical fluids. A delivery system (12) cooperates with a partial enclosure environment (30, 100, 200) retaining a movable substrate (14) for receiving precipitated functional material (44) along a fluid delivery path (13) from the delivery system (12). A shadow mask (22) is arranged in close proximity to the movable substrate (14) for forming the patterned deposition on the movable substrate (14).
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: August 24, 2004
    Assignee: Eastman Kodak Company
    Inventors: David J. Nelson, Suresh Sunderrajan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Jr., Sridhar Sadasivan, Rajesh V. Mehta, John E. Rueping
  • Patent number: 6753134
    Abstract: A process for the preparation of a radiation-sensitive silver halide emulsion comprised of high bromide cubical silver halide grains is described, the process comprising: (a) providing in a stirred reaction vessel a dispersing medium and high bromide silver halide seed grains, the seed grains comprising at least 5 mole % of the final emulsion silver, and (b) precipitating a silver halide shell which comprises at least 5 mole % of the final emulsion silver onto the seed grains by introducing at least a silver salt solution into the dispersing medium at a rate such that the normalized shell molar addition rate, Rs, is above 1.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: June 22, 2004
    Assignee: Eastman Kodak Company
    Inventors: Dirk J. Hasberg, Rajesh V. Mehta, Ralph W. Jones, Jr
  • Publication number: 20040110028
    Abstract: An imaging composition comprising a mixture of a solvent and a functional material; wherein the solvent is a compressed fluid and the functional material is a hole injecting material which is dissolved, dispersed and/or solubilized in the compressed fluid; wherein the mixture is thermodynamically stable or thermodynamically metastable or both; wherein the functional material is solvent-free upon deposition on a substrate; and wherein the functional material forms a solid film upon deposition on the substrate.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Glen C. Irvin, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh V. Mehta, Sridhar Sadasivan, Ross A. Sprout, Tin T. Vo
  • Publication number: 20040108061
    Abstract: A method and an apparatus for making a light emitting display is provided. The apparatus includes a discharge device with an inlet and an outlet with the portion of the discharge device defining a delivery path. An actuating mechanism is moveably positioned along the delivery path. A substrate retaining device is positioned spaced apart from the outlet of the discharge device in the delivery path. The inlet of the discharge device is adapted to be connected to a pressurized source of a thermodynamically stable mixture of a compressed fluid and one of a hole transporting material, a light emitting material, and an electron transporting material. The compressed fluid is in a gaseous state at a location beyond the outlet of the discharge device and prior to the substrate retaining device.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Suresh Sunderrajan, David J. Nelson, Glen C. Irvin, Rajesh V. Mehta
  • Publication number: 20040108510
    Abstract: An imaging composition comprising a mixture of a solvent and a functional material; wherein the solvent is a compressed fluid and the functional material is a electron transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid; wherein the mixture is thermodynamically stable or thermodynamically metastable or both; wherein the functional material is solvent-free upon deposition on a substrate; and wherein the functional material forms a solid film upon deposition on the substrate.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Glen C. Irvin, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh V. Mehta, Sridhar Sadasivan, Ross A. Sprout, Tin T. Vo
  • Publication number: 20040108060
    Abstract: A system (10) produces patterned deposition on a substrate (14) from compressed fluids. A delivery system (12) cooperates with a controlled environment (30, 100, 200) retaining a substrate (14) for receiving precipitated functional material (44) along a fluid delivery path (13) from the delivery system (12). A mask (22) is arranged in close proximity to the substrate (14) for forming the patterned deposition on the substrate (14).
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Suresh Sunderrajan, David J. Nelson, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Sridhar Sadasivan, Rajesh V. Mehta, John E. Rueping
  • Publication number: 20040109049
    Abstract: A system (10) produces patterned deposition on a substrate (14) from compressed fluids. A delivery system (12) cooperates with an independently controlled first chamber and an independently controlled second chamber retaining a substrate (14) for receiving precipitated functional material along a fluid flow delivery (13) from the delivery system (12). A shadow mask (22) is arranged in close proximity to the substrate (14) for forming the patterned deposition on the substrate (14).
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: David J. Nelson, Suresh Sunderrajan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Sridhar Sadasivan, Rajesh V. Mehta, John E. Rueping
  • Publication number: 20040110866
    Abstract: An imaging composition comprising a mixture of a solvent and a functional material; wherein the solvent is a compressed fluid and the functional material is a hole transporting material which is dissolved, dispersed and/or solubilized in the compressed fluid; wherein the mixture is thermodynamically stable or thermodynamically metastable or both; wherein the functional material is solvent-free upon deposition on a substrate; and wherein the functional material forms a solid film upon deposition on the substrate.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Glen C. Irvin, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh V. Mehta, Sridhar Sadasivan, Ross A. Sprout, Tin T. Vo
  • Publication number: 20040107903
    Abstract: A system (10) produces patterned deposition on a substrate (14) from supercritical fluids. A delivery system (12) cooperates with a partial enclosure environment (30, 100, 200) retaining a movable substrate (14) for receiving precipitated functional material (44) along a fluid delivery path (13) from the delivery system (12). A shadow mask (22) is arranged in close proximity to the movable substrate (14) for forming the patterned deposition on the movable substrate (14).
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: David J. Nelson, Suresh Sunderrajan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Sridhar Sadasivan, Rajesh V. Mehta, John E. Rueping
  • Publication number: 20040109952
    Abstract: A method produces patterned deposition on a substrate (14) from compressed fluid. A delivery system (12) cooperates with a controlled environment (30, 100, 200) retaining a substrate (14) for receiving precipitated functional material 44 along a fluid delivery path (13) from the delivery system (12). A mask (22) is arranged in close proximity to the substrate (14) for forming the patterned deposition on the substrate (14).
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Ramesh Jagannathan, Suresh Sunderrajan, Seshadri Jagannathan, Glen C. Irvin, Sridhar Sadasivan, David J. Nelson, Rajesh V. Mehta, John E. Rueping
  • Patent number: 6695980
    Abstract: An imaging composition comprises a mixture of a fluid and a functional material; wherein the fluid is compressed and the functional material is an electroluminescent material which is dissolved, dispersed and/or solubilized in the compressed fluid; and wherein the mixture is thermodynamically stable or thermodynamically metastable or both.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: February 24, 2004
    Assignee: Eastman Kodak Company
    Inventors: Glen C. Irvin, Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Suresh Sunderrajan, Rajesh V. Mehta
  • Publication number: 20040018456
    Abstract: A process for the preparation of a radiation-sensitive silver halide emulsion comprised of high bromide cubical silver halide grains is described, the process comprising: (a) providing in a stirred reaction vessel a dispersing medium and high bromide silver halide seed grains, the seed grains comprising at least 5 mole % of the final emulsion silver, and (b) precipitating a silver halide shell which comprises at least 5 mole % of the final emulsion silver onto the seed grains by introducing at least a silver salt solution into the dispersing medium at a rate such that the normalized shell molar addition rate, Rs, is above 1.
    Type: Application
    Filed: July 24, 2002
    Publication date: January 29, 2004
    Applicant: Eastman Kodak Company
    Inventors: Dirk J. Hasberg, Rajesh V. Mehta, Ralph W. Jones
  • Publication number: 20040007154
    Abstract: An imaging composition comprising a mixture of a fluid and a functional material; wherein the fluid is compressed and the functional material is dispersed and/or solubilized in the compressed fluid; and wherein the mixture is thermodynamically stable or thermodynamically metastable or both.
    Type: Application
    Filed: June 23, 2003
    Publication date: January 15, 2004
    Applicant: Eastman Kodak Company
    Inventors: Glen C. Irvin, Ramesh Jagannathan, Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, Rajesh V. Mehta, Ross A. Sprout
  • Patent number: 6672702
    Abstract: A method and apparatus for delivering solvent free marking material to a receiver is provided. A printhead includes a discharge device having an inlet and an outlet with a portion of the discharge device defining a delivery path. An actuating mechanism is moveably positioned along the delivery path. A material selection device has an inlet and an outlet with the outlet of the material selection device being connected in fluid communication to the inlet of the discharge device. The inlet of the material selection device is adapted to be connected to a pressurized source of a thermodynamically stable mixture of a fluid and a marking material, wherein the fluid is in a gaseous state at a location beyond the outlet of the discharge device. A calibration station is positioned relative to the printhead. Additionally, or alternatively, a cleaning station is positioned relative to the printhead.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: January 6, 2004
    Assignee: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, David J. Nelson, Seshadri Jagannathan, Suresh Sunderrajan, Gary E. Merz, John E. Rueping, Glen C. Irvin, Jr., Ramesh Jagannathan, Rajesh V. Mehta
  • Patent number: 6666548
    Abstract: A method and an apparatus for continuously delivering a solvent free marking material to a receiver includes a printhead with a discharge device is provided. The discharge device has an outlet and is in fluid communication with a pressurized reservoir of a thermodynamically stable mixture of a compressed fluid solvent and a marking material. The marking material becomes free of the solvent after ejected through the discharge device. A deflection mechanism is positioned relative to the outlet of the discharge device. The deflection mechanism is adapted to selectively deflect the marking material away from a first path to a second path. A gutter is positioned at an end of the first path, and the solvent free marking material is collected by the gutter. A receiver transporting mechanism is positioned at an end of the second path and the receiver transporting mechanism is adapted to provide a receiver to allow solvent free marking material be deposited on the receiver.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: December 23, 2003
    Assignee: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, David J. Nelson, Seshadri Jagannathan, Thomas C. Jackson, Glen C. Irvin, Jr., Ramesh Jagannathan, Suresh Sunderrajan, Rajesh V. Mehta