Patents by Inventor Debasis Majumdar

Debasis Majumdar 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).

  • Conductive absorption layer for flexible displays
    Patent number: 7630029
    Abstract: The present invention relates to a bistable reflective display and a method for making the display comprising a substrate, an electrically modulated imaging layer, and a coatable color contrast conductive layer comprising an electronically conductive polymer and colorant.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: December 8, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Debasis Majumdar, Charles L. Bauer, Gary S. Freedman, Delaina A. Allen
  • Touchscreen with conductive layer comprising carbon nanotubes
    Patent number: 7593004
    Abstract: The present invention is directed to a touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, a first electrically conductive layer in contact with said substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein at least the first electrically conductive layers or the exposed electrically conductive layers comprise carbon nanotubes.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: September 22, 2009
    Assignee: Eastman Kodak Company
    Inventors: Todd M. Spath, Glen C. Irvin, Jr., Debasis Majumdar, Ronald S. Cok, Charles C. Anderson
  • AZINIUM SALTS AS SPLAYANT FOR LAYERED MATERIALS
    Publication number: 20090176111
    Abstract: The present invention relates to a splayant, that is, an intercalant/exfoliant, comprising an azinium compound capable of splaying a layered material.
    Type: Application
    Filed: March 11, 2009
    Publication date: July 9, 2009
    Inventors: Debasis Majumdar, Deepak Shukla
  • High performance flexible display with improved mechanical properties having electrically modulated material mixed with binder material in a ratio between 6:1 and 0.5:1
    Patent number: 7557875
    Abstract: The present invention relates to a display comprising at least one substrate, at least one electrically conductive layer and at least one electronically modulated imaging layer, wherein the electronically modulated imaging layer comprises a self-assembled, close-packed, ordered monolayer of domains of electrically modulated material in a random coil fixed polymer matrix and filler.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: July 7, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Debasis Majumdar, Joseph S. Sedita, Krishnan Chari
  • Touchscreen with one carbon nanotube conductive layer
    Patent number: 7535462
    Abstract: The present invention is directed to a touchscreen comprising touch side electrode and device side electrode wherein each electrode comprises an insulating substrate and an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein only one of the exposed electrically conductive layers comprises carbon nanotubes.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: May 19, 2009
    Assignee: Eastman Kodak Company
    Inventors: Todd M. Spath, Glen C. Irvin, Jr., Debasis Majumdar, Charles C. Anderson
  • Barrier layers for coating conductive polymers on liquid crystals
    Patent number: 7532290
    Abstract: The present invention relates to a bistable reflective display comprising a water-swellable, electrically modulated imaging layer, a conductive layer comprising an electronically conductive polymer and a barrier layer therebetween and a method for making the same.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: May 12, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Debasis Majumdar, Gary S. Freedman, Glen C. Irvin, Jr.
  • POLYMERIC CONDUCTOR DONOR AND TRANSFER METHOD
    Publication number: 20090050855
    Abstract: The present invention relates to a donor laminate for transfer of a conductive layer comprising at least one electronically conductive polymer on to a receiver, wherein the receiver is a component of a device. The present invention also relates to methods pertinent to such transfers.
    Type: Application
    Filed: October 23, 2008
    Publication date: February 26, 2009
    Inventors: Debasis Majumdar, Glen C. Irvin, JR., Charles C. Anderson, Lee W. Tutt, Gary S. Freedman, Leonard S. Gates
  • Material, article and method of preparing materials containing oriented anisotropic particles
    Patent number: 7494704
    Abstract: The present invention relates to a method for preparing oriented anisotropic particles comprising the steps of providing at least one anisotropic particle, dispersing the one anisotropic particle(s) in a medium, and freeze drying the dispersion of anisotropic particle(s) and the medium. In another embodiment, the present invention relates to an oriented anisotropic material comprising at least one anisotropic particle dispersed in a medium and thereafter freeze dried. Another embodiment relates to an article comprising an oriented anisotropic material and at least one matrix, wherein the oriented anisotropic material comprises a freeze dried anisotropic material.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: February 24, 2009
    Assignee: Eastman Kodak Company
    Inventors: Dennis J. Massa, Thomas N. Blanton, Debasis Majumdar
  • Ionic liquid and electronically conductive polymer mixtures
    Patent number: 7438832
    Abstract: The invention relates to a mixture comprising an ionic liquid and an electronically conductive polymer in its cationic form and a polyanion associated with the conductive polymer.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: October 21, 2008
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Lee W. Tutt, Glen C. Irvin, Jr., Gary S. Freedman
  • Transparent polymeric coated conductor
    Patent number: 7427441
    Abstract: A member comprising a substrate and a transparent conductive layer comprising a composition including an electronically conductive polymer of a polythiophene present in a cationic form with a polyanion, wherein the composition of the conductive layer has an FOM less than or equal to 50 wherein FOM is defined as the slope of a best fit straight line passing through the origin of the plot of ln (1/T) versus [1/SER] for said composition: and wherein T=visual light transmission: SER=surface electrical resistance in ohm per square; FOM=figure of merit, and wherein the SER of the conductive layer has a value of less than or equal to 1000 ohm per square.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: September 23, 2008
    Inventors: Debasis Majumdar, Glen C. Irvin, Jr., Charles C. Anderson, Gary S. Freedman
  • AQUEOUS SUBBING FOR EXTRUDED THERMAL DYE RECEIVER
    Publication number: 20080220190
    Abstract: The present invention relates to an image recording element comprising a support having thereon an aqueous subbing layer and an extruded dye receiving layer, wherein the image recording element is a thermal dye receiver. The present invention also relates to a method of making a thermal dye receiving element comprising providing a support for an imaging element; applying an aqueous subbing layer to the support; and extruding thereon at least one thermal dye receiving layer.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 11, 2008
    Inventors: Debasis Majumdar, Narasimharao Dontula
  • Polymeric conductor donor and transfer method
    Patent number: 7414313
    Abstract: The present invention relates to a donor laminate for transfer of a conductive layer comprising at least one electronically conductive polymer on to a receiver, wherein the receiver is a component of a device. The present invention also relates to methods pertinent to such transfers.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: August 19, 2008
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Glen C. Irvin, Jr., Charles C. Anderson, Gary S. Freedman, Robert J. Kress
  • Metal and electronically conductive polymer transfer
    Patent number: 7410825
    Abstract: The invention relates to a donor laminate comprising in order, a substrate, an electronically conductive polymer layer in contact with said substrate, and a metal layer.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: August 12, 2008
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Glen C. Irvin, Jr., Joseph K. Madathil, Lee W. Tutt, Gary S. Freedman, Robert J. Kress
  • Display comprising liquid crystal droplets in a hydrophobic binder
    Patent number: 7387856
    Abstract: The present invention relates to a display comprising at least one substrate and at least one electronically modulated imaging layer and at least one electrically conductive layer, wherein the electronically modulated imaging layer comprises a self-assembled, close-packed, ordered monolayer of domains of electrically modulated material in a water insoluble, hydrophobic polymer matrix and the at least one electrically conductive layer comprises electronically conductive polymer and a conductivity enhancing agent.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: June 17, 2008
    Assignee: Industrial Technology Research Institute
    Inventors: Krishnan Chari, Debasis Majumdar
  • Conductive patterned sheet utilizing multi-layered conductive conduit channels
    Patent number: 7371452
    Abstract: Disclosed is an article comprising a polymer layer containing a plurality of integral polymer conduit channels that contain at least two layers with at least one comprising a conductive material and the other serving a function beyond protection.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: May 13, 2008
    Assignee: Eastman Kodak Company
    Inventors: Robert P. Bourdelais, Cheryl J. Kaminsky, Debasis Majumdar
  • Light curable articles containing azinium salts
    Patent number: 7365104
    Abstract: The present invention relates to a light curable material comprising a splayed layered material, at least one aqueous dispersible polymerizer, and at least one aqueous soluble N-oxyazinium compound, wherein the polymerizer polymerizes upon exposure to light. The present invention also includes a method for curing a material comprising providing layered material, splaying the layered material, combining the splayed layered material with a polymerizer and an aqueous soluble N-oxyazinium compound, and subjecting the combination to light for a period of time sufficient to effect the polymerization of the polymerizer.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: April 29, 2008
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Deepak Shukla
  • ARTICLE COMPRISING CONDUCTIVE CONDUIT CHANNELS
    Publication number: 20080085374
    Abstract: Disclosed is a process for preparing an article comprising a layer of nonconductive polymeric material comprising a plurality of integral polymer conduit channels containing a substantially transparent conductive material comprising applying the conductive material to the grooves and applying a protective overcoat within the channels.
    Type: Application
    Filed: October 11, 2007
    Publication date: April 10, 2008
    Inventors: Cheryl Kaminsky, Robert Bourdelais, Debasis Majumdar
  • Conductive polymer coating with improved aging stability
    Publication number: 20080007518
    Abstract: The invention relates to a member comprising a substrate and a transparent conductive layer comprising an electronically conductive polythiophene polymer present in a cationic form with a polyanion, wherein said conductive polymer has an FOM less than or equal to 50 wherein FOM is defined as the slope of the plot of ln (1/T) versus [1/SER]: and wherein T=visual light transmission SER=surface electrical resistance in ohm per square FOM=figure of merit, and wherein the SER has a value of less than or equal to 1000 ohm per square and wherein said transparent conductive layer has an ASI (aging stability index) of ?0.002.
    Type: Application
    Filed: June 23, 2006
    Publication date: January 10, 2008
    Inventors: Debasis Majumdar, Glen C. Irvin, Gary S. Freedman
  • Antistatic conductive grid pattern with integral logo
    Patent number: 7255912
    Abstract: The present invention relates to an article comprising a substrate having thereon at least one antistatic layer, wherein said antistatic layer comprises at least one conductive material, and wherein said antistatic layer comprises areas of patterned coverage, and wherein said patterned coverage comprises a graphic design.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: August 14, 2007
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Debasis Majumdar, Barry A. Fitzgerald, Kelly S. Robinson
  • Flexible sheet for resistive touch screen
    Patent number: 7230198
    Abstract: A resistive touch screen, comprising: a) a substrate; b) a first conductive layer located on the substrate; c) a flexible cover sheet having integral compressible spacer dots; and d) a second conductive layer located on the flexible cover sheet between and over the integral spacer dots, and having localized areas of lower conductivity over the integral compressible spacer dots relative to the conductivity of the conductive layer located on the flexible cover sheet between the integral spacer dots.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: June 12, 2007
    Assignee: Eastman Kodak Company
    Inventors: Ronald S. Cok, Glen C. Irvin, Jr., Debasis Majumdar, Gary S. Freedman