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).

  • Patent number: 7226890
    Abstract: A thermal printing ribbon that has reduced or no wrinkling during printing includes inorganic particles in a polymeric host material in at least one layer of the ribbon. The ribbon has improved mechanical and thermal properties as compared to ribbons not incorporating the inorganic particles. The ribbon can be used to form images on a dye-receiver element wherein the images have few or no artifacts caused by wrinkling of the thermal printing ribbon. The ribbon can be used in high speed printing.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: June 5, 2007
    Assignee: Eastman Kodak Company
    Inventors: Zhanjun Gao, Yuanqiao Rao, William H. Simpson, Debasis Majumdar, John F. Corman
  • Patent number: 7196281
    Abstract: A touch screen comprising: a) a substrate; b) a first conductive layer located on the substrate; c) a flexible sheet comprising a substantially planar surface and integral compressible spacer dots formed thereon, each integral compressible spacer dot having a base closest to the planar surface and a peak furthest from the planar surface; and d) a second conductive layer located on the surface of the flexible sheet, wherein the second conductive layer comprises a conductive mesh pattern and the peaks of the integral compressible spacer dots are located in non-conductive openings in the conductive mesh pattern; wherein when a minimum required activation force is applied to the touch screen at the location of one of the compressible spacer dots, the compressible spacer dot is compressed to allow electrical contact between the first and second conductive layers.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: March 27, 2007
    Assignee: Eastman Kodak Company
    Inventors: Ronald S. Cok, Debasis Majumdar, Glen C. Irvin, Jr.
  • Publication number: 20070059901
    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: Application
    Filed: September 15, 2005
    Publication date: March 15, 2007
    Inventors: Debasis Majumdar, Glen Irvin, Joseph Madathil, Lee Tutt, Gary Freedman, Robert Kress
  • Patent number: 7166656
    Abstract: The present invention describes an intercalated clay intercalated with a polyether block polyamide copolymer. An article is included comprising a matrix polymer and an intercalated clay comprising clay intercalated with polyether block polyamide copolymer. The present invention also includes an article comprising polyether block polyamide copolymer and intercalated clay.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 23, 2007
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Narasimharao Dontula, Thomas N. Blanton, Gary S. Freedman
  • Patent number: 7166657
    Abstract: The present invention relates to a splayed layered material comprising a layered material splayed with a highly branched polymer. Additional embodiments include a splayed layered material comprising a matrix polymer and layered material wherein said layered material is splayed with a highly branched polymer, an article comprising the splayed layered material in a matrix, and an exfoliated material.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: January 23, 2007
    Assignee: Eastman Kodak Company
    Inventors: Yuan Q. Rao, Jin-Shan Wang, Thomas N. Blanton, Samuel Chen, Robert J. Kress, Debasis Majumdar
  • Patent number: 7163746
    Abstract: The present invention relates to an electronically conductive particle comprising an acicular substrate in contact with an electronically conductive polymer. Another embodiment comprises an article comprising electronically conductive particles comprising an acicular substrate in contact with an electronically conductive polymer. A further embodiment comprises a method for making electronically conductive particles comprising providing at least one acicular substrate, combining at least one monomer with said at least one acicular substrate, and mixing at least one catalyst with said at least one acicular substrate and said at least one monomer.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: January 16, 2007
    Assignee: Eastman Kodak Company
    Inventors: Dennis J. Savage, Debasis Majumdar, Gary S. Freedman
  • Patent number: 7153620
    Abstract: The present invention relates to an antistatic article comprising a substrate or support having thereon at least one antistatic layer, wherein the antistatic layer comprises a conductive material having areas of patterned coverage. The present invention also relates to a display comprising a substrate having an electrically modulated imaging layer thereon, at least one electrically conductive layer, and at least one transparent antistatic layer, wherein said antistatic layer comprises a conductive material having areas of patterned coverage.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: December 26, 2006
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Debasis Majumdar
  • Publication number: 20060286309
    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: Application
    Filed: June 20, 2005
    Publication date: December 21, 2006
    Inventors: Krishnan Chari, Debasis Majumdar
  • Publication number: 20060274047
    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: Application
    Filed: June 2, 2005
    Publication date: December 7, 2006
    Inventors: Todd Spath, Glen Irvin, Debasis Majumdar, Charles Anderson
  • Publication number: 20060274048
    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: Application
    Filed: June 2, 2005
    Publication date: December 7, 2006
    Inventors: Todd Spath, Glen Irvin, Debasis Majumdar, Ronald Cok, Charles Anderson
  • Publication number: 20060274049
    Abstract: The present invention is directed to an electronically conductive article comprising at least one conductive carbon nanotube layer in contact with at least one conductive layer comprising electronically conductive polymer.
    Type: Application
    Filed: June 2, 2005
    Publication date: December 7, 2006
    Inventors: Todd Spath, Glen Irvine, Debasis Majumdar, Ronald Cok, Charles Anderson
  • Publication number: 20060262248
    Abstract: The present invention relates to a bistable matrix-addressable display element comprising a substrate, a bistable electrically modulated imaging layer having a reflection maximum, at least one conductor, and at least one field-spreading layer between said bistable electrically modulated imaging layer and said at least one conductor, wherein said field-spreading layer has a sheet resistance (SER) of less than 109 Ohms per square and a method of imaging the display comprising identifying an area to be updated of said bistable matrix-addressable display element, wherein said area to be updated comprises rows of pixels; and applying a sequence of drive signals having a 4-phase approach to image said bistable matrix-addressable display element, which may be characterized as a planar reset, left-slope selection method.
    Type: Application
    Filed: May 20, 2005
    Publication date: November 23, 2006
    Inventors: Mitchell Burberry, David Johnson, Charles Rankin, Debasis Majumdar
  • Publication number: 20060262260
    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: Application
    Filed: May 18, 2005
    Publication date: November 23, 2006
    Inventors: Debasis Majumdar, Gary Freedman, Glen Irvin
  • Publication number: 20060226396
    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: Application
    Filed: March 29, 2005
    Publication date: October 12, 2006
    Inventors: Debasis Majumdar, Lee Tutt, Glen Irvin, Gary Freedman
  • Publication number: 20060223902
    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: Application
    Filed: March 31, 2005
    Publication date: October 5, 2006
    Inventors: Debasis Majumdar, Deepak Shukla
  • Publication number: 20060223919
    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 31, 2005
    Publication date: October 5, 2006
    Inventors: Debasis Majumdar, Deepak Shukla
  • Publication number: 20060215077
    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: Application
    Filed: March 22, 2005
    Publication date: September 28, 2006
    Inventors: Debasis Majumdar, Joseph Sedita, Krishnan Chari
  • Publication number: 20060188723
    Abstract: The present invention relates to a coating composition comprising an aqueous dispersion of single wall carbon nanotubes with covalently attached hydrophilic species selected from the group consisting of carboxylic acid, nitrates, hydroxyls, sulfur containing groups, carboxylic acid salts, and phosphates, in an amount of at least 0.5 atomic % of said carbon nanotubes, wherein said carbon nanotubes are present in an amount of at least 0.05 wt. % of said dispersion.
    Type: Application
    Filed: February 22, 2005
    Publication date: August 24, 2006
    Inventors: Lawrence Rowley, Glen Irvin, Charles Anderson, Debasis Majumdar
  • Publication number: 20060188721
    Abstract: The present invention relates to a donor laminate for adhesive transfer of a conductive layer comprising a substrate having thereon a conductive layer comprising carbon nanotubes, in contact with said substrate
    Type: Application
    Filed: February 22, 2005
    Publication date: August 24, 2006
    Inventors: Glen Irvin, Debasis Majumdar, Charles Anderson, Lawrence Rowley, Gary Freedman
  • Publication number: 20060181658
    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: Application
    Filed: February 16, 2005
    Publication date: August 17, 2006
    Inventors: Debasis Majumdar, Charles Bauer, Gary Freedman, Delaina Allen