Patents by Inventor Sridhar Sadasivan
Sridhar Sadasivan 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).
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Patent number: 7153539Abstract: 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: GrantFiled: June 24, 2003Date of Patent: December 26, 2006Assignee: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, David J. Nelson, Rajesh V. Mehta, Glen C. Irvin, Jr., Thomas N. Blanton, Robert S. Cupello
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Patent number: 7044376Abstract: Authentication systems, apparatus, and methods authenticate an identification marking including a nanocrystalline material. One or more properties of the marking are ascertained to provide a measured profile. The measured profile is compared to at least one member of a closed set of reference profiles. Each reference profile has predetermined values of one or more properties. Each reference profile is unique within the set. At least one reference profile is characteristic of an indicator material in a nanocrystalline morphology and non-characteristic of the same indicator material in a bulk morphology.Type: GrantFiled: July 23, 2003Date of Patent: May 16, 2006Assignee: Eastman Kodak CompanyInventors: David J. Nelson, Seshadri Jagannathan, Ramesh Jagannathan, Thomas N. Blanton, Sridhar Sadasivan, Byron R. Sever, David D. Tuschel
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Publication number: 20060023027Abstract: 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: ApplicationFiled: September 8, 2005Publication date: February 2, 2006Inventors: Sridhar Sadasivan, Seshadri Jagannathan, Suresh Sunderrajan, Gary Merz, John Rueping, Glen Irvin, Ramesh Jagannathan, Rajesh Mehta, David Nelson
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Publication number: 20060013945Abstract: 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: ApplicationFiled: July 12, 2005Publication date: January 19, 2006Inventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Suresh Sunderrajan, David nelson, Glen Irvin, Rajesh Mehta
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Patent number: 6971739Abstract: 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: GrantFiled: June 5, 2002Date of Patent: December 6, 2005Assignee: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Seshadri Jagannathan, Suresh Sunderrajan, Gary E. Merz, John E. Rueping, Glen C. Irvin, Jr., Ramesh Jagannathan, Rajesh V. Mehta, David J. Nelson
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Patent number: 6927415Abstract: 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: GrantFiled: December 6, 2002Date of Patent: August 9, 2005Assignee: Eastman Kodak CompanyInventors: Glen C. Irvin, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh V. Mehta, Sridhar Sadasivan, Ross A. Sprout, Tin T. Vo
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Patent number: 6896723Abstract: 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: GrantFiled: December 6, 2002Date of Patent: May 24, 2005Assignee: Eastman Kodak CompanyInventors: Glen C. Irvin, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh V. Mehta, Sridhar Sadasivan, Ross A. Sprout, Tin T. Vo
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Patent number: 6896827Abstract: 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 an electroluminescent polymeric 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: GrantFiled: December 6, 2002Date of Patent: May 24, 2005Assignee: Eastman Kodak CompanyInventors: Glen C. Irvin, Sridhar Sadasivan, Ramesh Jagannathan
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Patent number: 6866371Abstract: A method and apparatus for printing and coating includes providing a pressurized source of a thermodynamically stable mixture of a solvent and a marking material. A printhead is connected to the pressurized source. The printhead is configured to produce a first shaped beam of the marking material and a second shaped beam of the marking material. The marking material can be different marking materials or the same marking material.Type: GrantFiled: January 17, 2002Date of Patent: March 15, 2005Assignee: Eastman Kodak CompanyInventors: Sridhar Sadasivan, David J. Nelson, Seshadri Jagannathan, Ramesh Jagannathan, Suresh Sunderrajan, Glen C. Irvin, Jr., Gary E. Merz, John E. Rueping
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Patent number: 6863368Abstract: A method of forming a color filter and a color filter are provided. The method includes providing a mixture of a color filter material and a compressed fluid; providing a substrate; providing a printhead adapted to deliver the mixture of the color filter material and the compressed fluid toward the substrate; positioning the printhead in a predetermined location relative to the substrate; and ejecting the mixture of the color filter material and the compressed fluid through the printhead toward the substrate, wherein the color filter material becomes free of the compressed fluid prior to the color filter material contacting the substrate at the predetermined location.Type: GrantFiled: June 12, 2003Date of Patent: March 8, 2005Assignee: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Rajesh V. Mehta, David J. Nelson, Glen C. Irvin, Jr.
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Publication number: 20050018013Abstract: Authentication systems, apparatus, and methods authenticate an identification marking including a nanocrystalline material. One or more properties of the marking are ascertained to provide a measured profile. The measured profile is compared to at least one member of a closed set of reference profiles. Each reference profile has predetermined values of one or more properties. Each reference profile is unique within the set. At least one reference profile is characteristic of an indicator material in a nanocrystalline morphology and non-characteristic of the same indicator material in a bulk morphology.Type: ApplicationFiled: July 23, 2003Publication date: January 27, 2005Inventors: David Nelson, Seshadri Jagannathan, Ramesh Jagannathan, Thomas Blanton, Sridhar Sadasivan, Byron Sever, David Tuschel
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Patent number: 6843556Abstract: 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: GrantFiled: December 6, 2002Date of Patent: January 18, 2005Assignee: Eastman Kodak CompanyInventors: David J. Nelson, Suresh Sunderrajan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Jr., Sridhar Sadasivan, Rajesh V. Mehta, John E. Rueping
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Publication number: 20050008424Abstract: 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: ApplicationFiled: June 24, 2003Publication date: January 13, 2005Inventors: David Nelson, Sridhar Sadasivan, Ramesh Jagannathan, Seshardi Jagannathan, Glen Irvin, Rajesh Mehta
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Publication number: 20040265622Abstract: 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: ApplicationFiled: June 24, 2003Publication date: December 30, 2004Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, David J. Nelson, Rajesh V. Mehta, Glen C. Irvin
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Publication number: 20040265478Abstract: 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: ApplicationFiled: June 24, 2003Publication date: December 30, 2004Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, David J. Nelson, Rajesh V. Mehta, Glen C. Irvin, Thomas N. Blanton, Robert S. Cupello
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Publication number: 20040263597Abstract: 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: ApplicationFiled: June 24, 2003Publication date: December 30, 2004Applicant: Eastman Kodak CompanyInventors: David J. Nelson, Sridhar Sadasivan, Ramesh Jagannathan, Seshadri Jagannathan, Glen C. Irvin, Rajesh V. Mehta
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Publication number: 20040241351Abstract: The invention provides an image recording element comprising a support and an ink-receiving layer wherein the ink-receiving layer comprises at least one porous layer adjacent the support, and at least one swellable layer adjacent the porous layer and on the surface of the image recording element, wherein the at least one porous layer has pores of a median pore diameter of between 0.05 and 1.0 &mgr;m and the at least one swellable layer has a thickness of between 0.5 and 5 &mgr;m. The image recording element of the invention is especially useful for ink jet printing.Type: ApplicationFiled: May 29, 2003Publication date: December 2, 2004Applicant: Eastman Kodak CompanyInventors: Sumana Sharmin, Sridhar Sadasivan, Lori Shaw-Klein, Edwin J. Voll
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Patent number: 6821586Abstract: An inkjet recording element comprising a support having thereon an image-receiving layer comprising non-silicon-containing inorganic oxide particles, the particles having their surfaces treated with a silane coupling agent having a hydrophilic, organic moiety.Type: GrantFiled: December 12, 2001Date of Patent: November 23, 2004Assignee: Eastman Kodak CompanyInventors: David M. Teegarden, Sridhar Sadasivan
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Patent number: 6815020Abstract: An ink jet recording element having a support having thereon a porous image-receiving layer having: (a) particles having a mean particle size of from greater than 0.04 &mgr;m to about 5 &mgr;m; and (b) water insoluble, cationic, polymeric particles having at least about 20 mole percent of a cationic mordant moiety.Type: GrantFiled: August 31, 2001Date of Patent: November 9, 2004Assignee: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Elizabeth A. Gallo, John M. Baier
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Patent number: 6790483Abstract: 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: GrantFiled: December 6, 2002Date of Patent: September 14, 2004Assignee: Eastman Kodak CompanyInventors: Ramesh Jagannathan, Suresh Sunderrajan, Seshadri Jagannathan, Glen C. Irvin, Jr., Sridhar Sadasivan, David J. Nelson, Rajesh V. Mehta, John E. Rueping