Patents by Inventor Rajesh Mehta

Rajesh 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: 7160573
    Abstract: A method of forming a color filter is provided. The method includes providing a mixture of a color filter material and a compressed fluid; providing at least a partially controlled environment for retaining a substrate, the at least partially controlled environment being in fluid communication with the mixture of the color filter material and the compressed fluid; providing a shadow mask in close proximity to the substrate retained in the at least partially controlled environment; and chargably releasing the mixture of the color filter material and the compressed fluid into the at least partially controlled environment, wherein the color filter material becomes free of the compressed fluid prior to contacting the substrate at locations defined by the shadow mask thereby forming a patterned deposition on the substrate.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: January 9, 2007
    Assignee: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh Mehta, David J. Nelson, Glen C. Irvin, Jr.
  • Publication number: 20060273713
    Abstract: In accordance with one embodiment, the present invention is directed towards a process for forming an organic electroluminescent device comprising depositing on a substrate at least first and second electrode layers and an organic EL element comprising one or more organic material layers between the first and second electrode layers, wherein at least one organic material layer of the EL element is deposited by providing a continuous stream of amorphous solid particles of organic material suspended in at least one carrier gas, the solid particles having a volume-weighted mean particle diameter of less than 500 nm, and depositing particles of the organic material to form a thin uniform layer of the organic material on the substrate surface.
    Type: Application
    Filed: June 2, 2005
    Publication date: December 7, 2006
    Inventors: Rajesh Mehta, Ramesh Jagannathan, Bradley Houghtaling, Robert Link, Kelly Robinson, Ross Sprout
  • Publication number: 20060275542
    Abstract: A process for the deposition of a thin film of a desired material on a surface comprising: (i) providing a continuous stream of amorphous solid particles of desired material suspended in at least one carrier gas, the solid particles having a volume-weighted mean particle diameter of less than 500 nm, at an average stream temperature below the glass transition temperature of the solid particles of desired material, (ii) passing the stream provided in (i) into a heating zone, and heating the stream in the heating zone to elevate the average stream temperature to above the glass transition temperature of the solid particles of desired material, wherein no substantial chemical transformation of the desired material occurs due to heating of the desired material, (iii) exhausting the heated stream from the heating zone through at least one distributing passage, at a rate substantially equal to its rate of addition to the heating zone in step (ii), wherein the carrier gas does not undergo a thermodynamic phase chang
    Type: Application
    Filed: June 2, 2005
    Publication date: December 7, 2006
    Inventors: Rajesh Mehta, Ramesh Jagannathan, Bradley Houghtaling, Robert Link, Kelly Robinson, Ross Sprout, Kenneth Reed, Alok Verma, Scott Mahon, Robledo Gutierrez, Thomas Blanton, Jill Fornalik
  • Publication number: 20060263713
    Abstract: Methods of forming a dye donor layer of a dye-donor element for a thermal dye transfer system are described. The methods include coating colored particles in a compressed carrier fluid on the substrate of the dye-donor element.
    Type: Application
    Filed: May 23, 2005
    Publication date: November 23, 2006
    Inventors: David Foster, Maurice Gray, Rajesh Mehta, Ramesh Jagannathan
  • Publication number: 20060041248
    Abstract: A method, system and applicator for the solvent-less delivery of a bio-active material to a receiver. The applicator includes a discharge device, a reservoir which holds a bioactive material, and a solvent at a supercritical fluid state for delivering the bioactive material through the discharge device to the receiver. A spacer may be positioned between the discharge device and the receiver. The receiver may have a plurality of different bio-active material to be applied to a subject, each located at a different location on the receiver.
    Type: Application
    Filed: August 23, 2004
    Publication date: February 23, 2006
    Inventors: David Patton, John Spoonhower, David Nelson, John Pochan, Timothy Keefe, Kenneth Reed, Rajesh Mehta, Ramesh Jagannathan
  • Publication number: 20060023027
    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.
    Type: Application
    Filed: September 8, 2005
    Publication date: February 2, 2006
    Inventors: Sridhar Sadasivan, Seshadri Jagannathan, Suresh Sunderrajan, Gary Merz, John Rueping, Glen Irvin, Ramesh Jagannathan, Rajesh Mehta, David Nelson
  • Publication number: 20060013945
    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: July 12, 2005
    Publication date: January 19, 2006
    Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Suresh Sunderrajan, David nelson, Glen Irvin, Rajesh Mehta
  • Publication number: 20050221018
    Abstract: A process for the deposition of particulate material of a desired substance on a surface includes: (i) charging a particle formation vessel with a compressed fluid; (ii) introducing into the particle formation vessel a first feed stream comprising a solvent and the desired substance dissolved therein and a second feed stream comprising the compressed fluid, wherein the desired substance is less soluble in the compressed fluid relative to its solubility in the solvent and the solvent is soluble in the compressed fluid, and wherein the first feed stream is dispersed in the compressed fluid, allowing extraction of the solvent into the compressed fluid and precipitation of particles of the desired substance; (iii) exhausting compressed fluid, solvent and the desired substance from the particle formation vessel at a rate substantially equal to the rate of addition of such components to the vessel in step (ii) through a restrictive passage to a lower pressure whereby the compressed fluid is transformed to a gaseous
    Type: Application
    Filed: March 31, 2004
    Publication date: October 6, 2005
    Inventors: Rajesh Mehta, Ramesh Jagannathan, Seshadri Jagannathan, Kelly Robinson, Karen Pond, Bradley Houghtaling
  • Publication number: 20050220994
    Abstract: A process for the patterning of a desired substance on a surface includes: (i) charging a particle formation vessel with a compressed fluid; (ii) introducing into the particle formation vessel a first feed stream comprising a solvent and the desired substance dissolved therein and a second feed stream comprising the compressed fluid, wherein the desired substance is less soluble in the compressed fluid relative to its solubility in the solvent and the solvent is soluble in the compressed fluid, and wherein the first feed stream is dispersed in the compressed fluid, allowing extraction of the solvent into the compressed fluid and precipitation of particles of the desired substance; (iii) exhausting compressed fluid, solvent and the desired substance from the particle formation vessel at a rate substantially equal to a rate of addition of such components to the vessel in step (ii) through a restrictive passage to a lower pressure whereby the compressed fluid is transformed to a gaseous state, and wherein the re
    Type: Application
    Filed: March 31, 2004
    Publication date: October 6, 2005
    Inventors: Rajesh Mehta, Ramesh Jagannathan, Seshadri Jagannathan, David Nelson
  • Publication number: 20050218076
    Abstract: A process for the formation of particulate material of a desired substance including: (i) charging a particle formation vessel with a supercritical fluid; (ii) agitating the contents of the particle formation vessel with a rotary agitator, creating a relatively highly agitated zone and a bulk mixing zone; (iii) introducing into the agitated particle formation vessel at least a first feed stream comprising at least a solvent and the desired substance dissolved therein and a second feed stream comprising the supercritical fluid through a second feed stream introduction port, wherein the desired substance is less soluble in the supercritical fluid relative to its solubility in the solvent, and wherein the first and second feed streams are introduced into the highly agitated zone of the particle formation vessel and the first feed stream is dispersed in the supercritical fluid by action of the rotary agitator, allowing extraction of the solvent into the supercritical fluid, and (iv) precipitating particles of the
    Type: Application
    Filed: March 31, 2004
    Publication date: October 6, 2005
    Inventors: Rajesh Mehta, Ramesh Jagannathan, Seshadri Jagannathan, Robert Zabelny, Ross Sprout, Carl Burns
  • Publication number: 20050136250
    Abstract: A process for the preparation of a self assembled superlattice thin film of organic nanocrystal particles is described comprising: (i) combining one or more functional organic material to be precipitated as nanocrystal particles and one or more surface active material in a compressed CO2 phase with a density of at least 0.
    Type: Application
    Filed: December 22, 2003
    Publication date: June 23, 2005
    Inventors: Thomas Blanton, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh Mehta
  • Publication number: 20050008424
    Abstract: An article having multiple spectral deposits is provided. The article can include a support and a single nanomorphic marking material adapted to reflect light having a first spectral content and adapted to reflect light having a second spectral content. The article can include a support and a nanomorphic marking material held by the support that luminesces at a plurality of wavelengths. The article can include a support and marking material having a first particle size and a second particle size. The first particle size reflects a first spectrum and the second particle size reflects a second spectrum. The article can include a support and a marking material held by said support with the marking material including a nanocrystalline particulate having a measurable property non-characteristic of the same marking material in a bulk state.
    Type: Application
    Filed: June 24, 2003
    Publication date: January 13, 2005
    Inventors: David Nelson, Sridhar Sadasivan, Ramesh Jagannathan, Seshardi Jagannathan, Glen Irvin, Rajesh Mehta
  • Publication number: 20040109939
    Abstract: A method of forming a color filter is provided. The method includes providing a mixture of a color filter material and a compressed fluid; providing at least a partially controlled environment for retaining a substrate, the at least partially controlled environment being in fluid communication with the mixture of the color filter material and the compressed fluid; providing a shadow mask in close proximity to the substrate retained in the at least partially controlled environment; and chargably releasing the mixture of the color filter material and the compressed fluid into the at least partially controlled environment, wherein the color filter material becomes free of the compressed fluid prior to contacting the substrate at locations defined by the shadow mask thereby forming a patterned deposition on the substrate.
    Type: Application
    Filed: June 12, 2003
    Publication date: June 10, 2004
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh Mehta, David J. Nelson, Glen C. Irvin