Patents by Inventor Seshadri Jagannathan

Seshadri Jagannathan 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).

  • Publication number: 20240062984
    Abstract: A cathode of an electron emitting device is described, where the cathode comprises a carbon nanotube (CNT); a nano-filler material; and a carbonizable polymer, and where the cathode exhibits increased hardness, is formed by high temperature thermal treatment, and is devoid of a substrate. Also described is a method of forming a cathode of an electron emitting device, where the method comprises a) forming a dispersed mixture comprising a carbon nanotube, a nano-filler material, and a carbonizable polymer in a solvent; b) coating and/or extruding the mixture; c) drying the coated and/or extruded mixture to remove at least a substantial portion of the solvent; and d) subjecting the dried mixture to a high temperature thermal treatment; where the method results in the cathode of an electron emitting device having increased hardness.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 22, 2024
    Inventors: Seshadri JAGANNATHAN, Lawrence D. FOLTS
  • Patent number: 11295872
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including a selected blue dye that can be recycled while maintaining sufficient image quality characteristics.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: April 5, 2022
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Patent number: 11200999
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including a selected blue dye that can improve resolution. Certain exemplary storage phosphor panels include inorganic storage phosphor material with specific extrudable blue dye (copper phthalocyanine) for resolution greater than 16 line pairs per mm. Certain exemplary storage phosphor panel embodiments include any non-needle storage phosphor panel with resolution greater than or equal to 19 line pairs per mm.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: December 14, 2021
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Patent number: 11069454
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including reduced noise. Further disclosed are certain exemplary method and/or apparatus embodiments that can include inorganic storage phosphor layer including at least one polymer, an inorganic storage phosphor material, and a copper phthalocyanine based blue dye.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: July 20, 2021
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Publication number: 20200279668
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including reduced noise. Further disclosed are certain exemplary method and/or apparatus embodiments that can include inorganic storage phosphor layer including at least one polymer, an inorganic storage phosphor material, and a copper phthalocyanine based blue dye.
    Type: Application
    Filed: March 31, 2016
    Publication date: September 3, 2020
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffrey, Jean-Marc Inglese
  • Publication number: 20200279667
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including a selected blue dye that can improve resolution. Certain exemplary storage phosphor panels include inorganic storage phosphor material with specific extrudable blue dye (copper phthalocyanine) for resolution greater than 16 line pairs per mm. Certain exemplary storage phosphor panel embodiments include any non-needle storage phosphor panel with resolution greater than or equal to 19 line pairs per mm.
    Type: Application
    Filed: March 31, 2016
    Publication date: September 3, 2020
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Publication number: 20180372888
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, and a blue dye, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including reduced leaching rates.
    Type: Application
    Filed: July 29, 2016
    Publication date: December 27, 2018
    Inventors: Seshadri JAGANNATHAN, Charles M. RANKIN, Lawrence D. FOLTS, Barbara ULREICH, Betsy J. GUFFEY, Jean-Marc INGLESE
  • Publication number: 20180374598
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including a selected blue dye that can be recycled while maintaining sufficient image quality characteristics.
    Type: Application
    Filed: August 5, 2016
    Publication date: December 27, 2018
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Publication number: 20180374597
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including reduced defects. Further disclosed are certain exemplary method and/or apparatus embodiments that can include inorganic storage phosphor layer including at least one polymer, an inorganic storage phosphor material, where the inorganic storage phosphor material has 95% of the particles of a certain size range.
    Type: Application
    Filed: March 31, 2016
    Publication date: December 27, 2018
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Publication number: 20180372889
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polymer and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has an image quality comparable to that of a traditional solvent coated inorganic storage phosphor screen. Further disclosed are certain exemplary method and/or apparatus embodiments that can provide inorganic storage phosphor panels including reduced tearing or grinding resistance. Further disclosed are certain exemplary method and/or apparatus embodiments that can include inorganic storage phosphor layer including at least one polymer, an inorganic storage phosphor material, and a copper phthalocyanine based blue dye.
    Type: Application
    Filed: August 4, 2016
    Publication date: December 27, 2018
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Lawrence D. Folts, Barbara Ulreich, Betsy J. Guffey, Jean-Marc Inglese
  • Patent number: 10120083
    Abstract: A storage phosphor panel can include an extruded inorganic storage phosphor layer including a thermoplastic polyolefin and an inorganic storage phosphor material, where the extruded inorganic storage phosphor panel has a DQE comparable to that of a traditional extruded inorganic solvent coated inorganic storage phosphor screen. Also disclosed is an inorganic storage phosphor detection system including an extruded inorganic storage phosphor panel that can include an extruded inorganic storage phosphor layer including a thermoplastic olefin and an inorganic storage phosphor material; and photodetector(s) coupled to the extruded inorganic storage phosphor panel to detect photons generated from the extruded inorganic storage phosphor panel.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: November 6, 2018
    Assignee: Carestream Dental Technology Topco Limited
    Inventors: Seshadri Jagannathan, Chang-Ying Joseph Yang, Kevin L. Bishop, Mark S. Purdum
  • Patent number: 9869778
    Abstract: Described is a scintillator screen including a plurality of filaments. Each of the plurality of filaments includes scintillating particles dispersed within a thermoplastic polymer. The thermoplastic polymer includes an elastic additive. The scintillating particles are from about 10 volume percent to about 60 volume percent of each of the plurality of filaments. Each of the plurality of filaments has a refractive index of greater than or equal to 1.5. The plurality of filaments are substantially parallel to each other and are at a volume packing of from about 60 percent to about 90 percent.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: January 16, 2018
    Inventors: Seshadri Jagannathan, Charles M. Rankin, David Gruszczynski, Jean-Marc Inglese, Kevin L. Bishop, Richard A. Lombardo
  • Patent number: 9739896
    Abstract: Described is a scintillator screen that includes a supporting layer having a phosphor dispersed in a polymeric binder disposed on the supporting layer and a barrier layer disposed on the polymeric binder. The barrier layer includes a non-moisture absorbing polymer selected from the group consisting of polyethylene terephthalate, cellulose diacetate, ethylene vinyl acetate and polyvinyl butyraldehyde. The barrier layer has a thickness of less than 1 micron. An antistatic layer is disposed on the barrier layer. The antistatic layer includes poly(3,4-ethylenedixythiophene)-poly(styrene sulfonate) (PEDOT/PSS) dispersed in a polymer selected from the group consisting of a polyester and a polyurethane. The antistatic layer has a transparency of greater than 95 percent at a wavelength of from about 400 nm to 600 nm.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: August 22, 2017
    Assignee: Carestream Health, Inc.
    Inventors: Seshadri Jagannathan, Timothy J. Tredwell, Charles M. Rankin, David Gruszczynski, Daniel M. Leusch
  • Publication number: 20170068002
    Abstract: Described is a scintillator screen that includes a supporting layer having a phosphor dispersed in a polymeric binder disposed on the supporting layer and a barrier layer disposed on the polymeric binder. The barrier layer includes a non-moisture absorbing polymer selected from the group consisting of polyethylene terephthalate, cellulose diacetate, ethylene vinyl acetate and polyvinyl butyraldehyde. The barrier layer has a thickness of less than 1 micron. An antistatic layer is disposed on the barrier layer. The antistatic layer includes poly(3,4-ethylenedixythiophene)-poly(styrene sulfonate) (PEDOT/PSS) dispersed in a polymer selected from the group consisting of a polyester and a polyurethane. The antistatic layer has a transparency of greater than 95 percent at a wavelength of from about 400 nm to 600 nm.
    Type: Application
    Filed: November 17, 2016
    Publication date: March 9, 2017
    Inventors: Seshadri Jagannathan, Timothy J. Tredwell, Charles M. Rankin, David Gruszczynski, Daniel M. Leusch
  • Publication number: 20160131770
    Abstract: Described is a scintillator screen including a plurality of filaments. Each of the plurality of filaments includes scintillating particles dispersed within a thermoplastic polymer. The thermoplastic polymer includes an elastic additive. The scintillating particles are from about 10 volume percent to about 60 volume percent of each of the plurality of filaments. Each of the plurality of filaments has a refractive index of greater than or equal to 1.5. The plurality of filaments are substantially parallel to each other and are at a volume packing of from about 60 percent to about 90 percent.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 12, 2016
    Applicant: Carestream Health, Inc.
    Inventors: Seshadri Jagannathan, Charles M. Rankin, David Gruszczynski, Jean-Marc Inglese, Kevin L. Bishop, Richard A. Lombardo
  • Patent number: 9223034
    Abstract: Provided herein are laminated devices including an extruded scintillation screen comprising a scintillator material that does not attract dust, and a thermally-sensitive elastomer binder; and a fiber optic plate. Also provided herein are methods of making a laminated device and methods of making an X-ray imaging panel.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: December 29, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Brian P. Aylward, Seshadri Jagannathan, Kevin L. Bishop, Richard A. Lombardo
  • Patent number: 9211565
    Abstract: There is described a digital radiography panel that includes a scintillator screen, an adhesive layer and a flat panel detector. The scintillator screen includes a supporting layer; a phosphor dispersed in a polymeric binder disposed on the supporting layer and an antistatic layer disposed on the polymeric binder, wherein the antistatic layer has a transparency of greater than 95 percent at a wavelength of from about 400 nm to 600 nm and a surface resistivity of less than 105 ohms per square. The adhesive layer is disposed on the scintillator screen and includes a material selected from the group consisting of acrylic polymers and urethane polymers. The adhesive layer has a thickness of from about 5 ?m to about 15 ?m. The adhesive layer has a transmittance of greater than 95 percent at a wavelength of from about 400 nm to 600 nm. The flat panel detector is disposed on the adhesive layer.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: December 15, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Seshadri Jagannathan, David Gruszczynski, Charles M. Rankin, Kevin L. Bishop, Brian P. Aylward
  • Publication number: 20150301198
    Abstract: Described is a scintillator screen including a plurality of filaments. Each of the plurality of filaments includes scintillating particles dispersed within a thermoplastic polymer. The thermoplastic polymer includes an elastic additive. The scintillating particles are from about 10 volume percent to about 60 volume percent of each of the plurality of filaments. Each of the plurality of filaments has a refractive index of greater than or equal to 1.5. The plurality of filaments are substantially parallel to each other and are at a volume packing of from about 60 percent to about 90 percent.
    Type: Application
    Filed: November 8, 2013
    Publication date: October 22, 2015
    Applicant: Carestream Health, Inc.
    Inventors: Seshadri Jagannathan, Charles M. Rankin, David Gruszczynski, Jean-Marc Inglese, Kevin L. Bishop, Richard A. Lombardo
  • Patent number: 9079217
    Abstract: There is described a method of manufacturing a digital radiography panel. The method includes providing a scintillator screen and spray coating an acrylic adhesive composition on the scintillator screen. A flat panel detector and the scintillator screen with acrylic adhesive composition are compressed together at a force of about 5 psi to about 15 psi, at an atmospheric pressure of about 0.3 Torr to about 100.0 Torr for a time sufficient to affix the flat panel detector to the scintillator screen to form the digital radiography panel.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: July 14, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Seshadri Jagannathan, Timothy J. Tredwell, Eric L. Dillenbeck, David Gruszczynski, Daniel M. Leusch, Charles M. Rankin, Bradley S. Jadrich, Brian P. Aylward, Kevin L. Bishop
  • Patent number: 9069086
    Abstract: A patterned scintillator panel including an extruded scintillator layer comprising a thermoplastic polyolefin and a scintillator material, wherein the scintillator layer comprises a pattern. Also disclosed is a method of making a patterned scintillator panel including forming a scintillator layer by melt extrusion, the scintillator layer comprising thermoplastic particles comprising a thermoplastic polyolefin and a scintillator material; and patterning the scintillator layer. Further disclosed is a method of making a patterned scintillator panel including forming a scintillator layer by injection molding, the scintillator layer comprising thermoplastic particles comprising a thermoplastic polyolefin and a scintillator material; and patterning the scintillator layer.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: June 30, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Seshadri Jagannathan, Charles M. Rankin, Jean-Marc Inglese, David Gruszczynski