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: 7087351
    Abstract: The present invention relates to a display comprising at least one substrate having at least one electrically modulated imaging layer thereon, at least one patterned electrically conductive layer, and at least one antistatic layer.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: August 8, 2006
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Debasis Majumdar, Hwei-Ling Yau, William J. Durkin, Donald O. Bigelow, Daniel A. Slater, Kelly S. Robinson
  • Patent number: 7083885
    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.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: August 1, 2006
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Debasis Majumdar, Robert C. Daly, Kelly S. Robinson, Barry A. Fitzgerald, Paul A. Christian
  • Publication number: 20060131703
    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: December 22, 2004
    Publication date: June 22, 2006
    Inventors: Debasis Majumdar, Glen Irvin, Charles Anderson, Gary Freedman, Robert Kress
  • Publication number: 20060110580
    Abstract: An electromodulating display comprises (1) a nonconductive polymeric unitary substrate containing a plurality of patterned grooves containing an electrically-conductive material so as to form an electrical network having a switchable electric field orientation; (2) a switch for switching the electric field orientation; and (3) a medium that is optically shifted in response to the switching of the electric field orientation.
    Type: Application
    Filed: October 27, 2005
    Publication date: May 25, 2006
    Inventors: Peter Aylward, Cheryl Kaminsky, Robert Bourdelais, Fitzroy Crosdale, Debasis Majumdar, Daniel Slater
  • Publication number: 20060105152
    Abstract: A resistive touch screen, comprising: a) a substrate; b) a first conductive layer located on the substrate; c) a flexible cover 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, with a microstructured surface on the peak of each of the integral compressible spacer dots; and d) a second conductive layer located on the flexible cover sheet, the peaks of the integral compressible spacer dots extending through the second conductive layer, whereby, when a force is applied to the flexible transparent cover sheet 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: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Ronald Cok, Debasis Majumdar, Glen Irvin
  • Publication number: 20060102452
    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: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Ronald Cok, Glen Irvine, Debasis Majumdar, Gary Freedman
  • Publication number: 20060105148
    Abstract: An article is described, comprising: a) a substrate having first regions having a microstructured surface and second regions not having a microstructured surface, where the first regions and second regions are relatively differentially wettable; and b) a patterned layer formed on the substrate from a coating that preferentially wets the relatively more wettable regions of the substrate. A method of making a patterned coating is also described, comprising the steps of: a) providing a substrate having first regions having a microstructured surface and second regions not having a microstructured surface, where the first regions and second regions are relatively differentially wettable; and b) coating the substrate with a coating material that preferentially wets the relatively more wettable regions of the substrate to form a patterned layer on the substrate.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Ronald Cok, Debasis Majumdar, Glen Irvin
  • Publication number: 20060102461
    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: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Ronald Cok, Debasis Majumdar, Glen Irvin
  • Publication number: 20060088698
    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 21, 2004
    Publication date: April 27, 2006
    Inventors: Debasis Majumdar, Glen Irvin, Charles Anderson, Lee Tutt, Gary Freedman, Leonard Gates
  • Publication number: 20060068329
    Abstract: The present invention relates to a display comprising at least one substrate having at least one electrically modulated imaging layer thereon, at least one patterned electrically conductive layer, and at least one antistatic layer.
    Type: Application
    Filed: September 29, 2004
    Publication date: March 30, 2006
    Inventors: Peter Aylward, Debasis Majumdar, Hwei-Ling Yau, William Durkin, Donald Bigelow, Daniel Slater, Kelly Robinson
  • Publication number: 20060062983
    Abstract: The invention relates to a conductive film comprising single wall carbon nanotubes and polyethylenedioxythiophene
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Inventors: Glen Irvin, Debasis Majumdar, Charles Anderson, Lawrence Rowley, Gary Freedman
  • Publication number: 20060062975
    Abstract: The present invention provides a member comprising a substrate and a transparent conductive layer comprising an electronically conductive polymer of a polythiophene present in a cationic form with a polyanion-, wherein said conductive layer-has an FOM less than or equal to 50 wherein FOM is defined as the slope of the plot of ln (I/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.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Inventors: Debasis Majumdar, Glen Irvin, Charles Anderson, Gary Freedman
  • Patent number: 6995395
    Abstract: Disclosed is a multilayer compensator polymeric film for a LC cell including two or more first type layers having an out-of-plane birefringence not more negative than ?0.005 and one or more second type layers having an out-of-plane birefringence more negative than ?0.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: February 7, 2006
    Assignee: Eastman Kodak Company
    Inventors: James F. Elman, Charles C. Anderson, Debasis Majumdar, Mridula Nair, Roger Yonkoski
  • Patent number: 6991750
    Abstract: A composition for an antistat layer comprising: a chlorinated polyolefin; a conductive agent; and a solvent.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: January 31, 2006
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Richard A. Castle, Janglin Chen
  • Patent number: 6958860
    Abstract: Disclosed is an optical element comprising a polymer film containing a dispersion of minute layered particulates and microvoids.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: October 25, 2005
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Debasis Majumdar, Robert P. Bourdelais, Cheryl J. Kaminsky, Michael R. Brickey, Thomas M. Laney
  • Publication number: 20050137089
    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: Application
    Filed: December 23, 2003
    Publication date: June 23, 2005
    Inventors: Zhanjun Gao, Yuanqiao Rao, William Simpson, Debasis Majumdar, John Corman
  • Publication number: 20050134772
    Abstract: Disclosed is a multilayer compensator polymeric film for a LC cell comprising two or more first layers having an out-of-plane birefringence not more negative than ?0.005 and one or more second layers having an out-of-plane birefringence more negative than ?0.
    Type: Application
    Filed: December 23, 2003
    Publication date: June 23, 2005
    Inventors: James Elman, Charles Anderson, Debasis Majumdar, Mridula Nair, Roger Yonkoski
  • Patent number: 6888663
    Abstract: The invention relates to an optical component comprising a dispersion of layered minute particulate materials in a binder, the layered materials having a layer thickness, a concentration of particulate in the binder, and a basal plane spacing sufficient to provide a component having a light transmissivity of at least 50%.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: May 3, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert P. Bourdelais, Narasimharao Dontula, Debasis Majumdar, Cheryl J. Kaminsky
  • Patent number: 6881492
    Abstract: A composition suitable for forming a primer layer on a polymer sheet comprising: a) polyethyleneimine; b) latex; wherein the latex has a Tg lower than 25° C. and c) a hydrophilic colloid material. A method of coating the composition is also disclosed.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: April 19, 2005
    Assignee: Eastman Kodak Company
    Inventors: Yuanqiao Rao, DeBasis Majumdar, Robert J. Kress, David E. Decker
  • Publication number: 20050069683
    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: Application
    Filed: September 23, 2003
    Publication date: March 31, 2005
    Inventors: Peter Aylward, Debasis Majumdar, Barry Fitzgerald, Kelly Robinson