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: 8222186
    Abstract: A thermal dye image receiver element has, in order, a cellulosic raw base support, an antistatic subbing layer, and a thermal dye receiving layer. The cellulosic raw base support has an internal electrical resistance (WER) that is at least 1 log ohm/square greater than the surface electrical resistance (SER) of the antistatic subbing layer. This arrangement of antistatic properties overcomes a static problem in the thermal dye image receiver elements by properly balancing the conductivity between the two antistatic locations.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: July 17, 2012
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, James S. Honan, Charles H. Weidner
  • Patent number: 8134581
    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: Grant
    Filed: August 29, 2009
    Date of Patent: March 13, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Mitchell S. Burberry, David M. Johnson, Charles M. Rankin, Jr., Debasis Majumdar
  • Patent number: 8062734
    Abstract: Disclosed is an article comprising a layer of nonconductive polymeric material comprising a plurality of integral polymer conduit channels containing a substantially transparent conductive material.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: November 22, 2011
    Assignee: Eastman Kodak Company
    Inventors: Cheryl J. Kaminsky, Robert P. Bourdelais, Debasis Majumdar
  • Publication number: 20110244149
    Abstract: An image receiving element has an extruded compliant layer, an extruded image receiving layer, and a topcoat immediately adjacent the extruded image receiving layer. The extruded image receiving layer is non-crosslinked and has a glass transition temperature (Tg) of from about 40° C. to about 80° C. whereas the topcoat is an aqueous-coated layer and has a Tg that is within a range of plus or minus 10° C. of the Tg of the extruded image receiving layer. The dry thickness ratio of the topcoat to the extruded image receiving layer is from 1:2 to 1:20.
    Type: Application
    Filed: March 31, 2010
    Publication date: October 6, 2011
    Inventors: Debasis Majumdar, Narasimharao Dontula, Kevin M. Ryan, Somsack Chang
  • Patent number: 7999832
    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: Grant
    Filed: May 20, 2005
    Date of Patent: August 16, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Mitchell S. Burberry, David M. Johnson, Charles M. Rankin, Jr., Debasis Majumdar
  • Publication number: 20110143060
    Abstract: A thermal, non-silver halide-containing image receiver element includes a support and an aqueous-coated image receiving layer. This receiving layer comprises a water-dispersible polymer having a polyurea or polyurethane backbone and up to 25 weight % of the water-dispersible polymer comprising polysiloxane side chains that are covalently attached to the backbone, each of the side chains having a molecular weight of at least 500. Aqueous dispersions of polyester ionomers and crosslinking agents can also be present.
    Type: Application
    Filed: February 17, 2011
    Publication date: June 16, 2011
    Inventors: Debasis Majumdar, Teh-Ming Kung, Catherine A. Falkner, Yongcai Wang, Cheryl Lenhard, Paul D. Yacobucci
  • Publication number: 20110117299
    Abstract: An image receiver element includes a water-soluble or water-dispersible polyurethane binder in the image receiving layer. This polyurethane has a Tg of from about 60 to about 80° C., a molecular weight of at least 25,000, and an acid number of from about 16 to about 35 mg KOH/g. Moreover, the polyurethane comprises from about 42 to about 60 weight % of recurring urethane units, from about 8 to about 20 weight % of alkylene glycol recurring units, from about 18 to about 40 weight % of carbonate recurring units having aliphatic side chains, and from about 3 to about 15 weight % of recurring units having a water-soluble or water-dispersible acid group, based on total binder weight.
    Type: Application
    Filed: November 19, 2009
    Publication date: May 19, 2011
    Inventors: Teh-Ming Kung, Catherine A. Falkner, Yongcai Wang, Debasis Majumdar
  • Publication number: 20110091667
    Abstract: A thermal dye image receiver element has, in order, a cellulosic raw base support, an antistatic subbing layer, and a thermal dye receiving layer. The cellulosic raw base support has an internal electrical resistance (WER) that is at least 1 log ohm/square greater than the surface electrical resistance (SER) of the antistatic subbing layer. This arrangement of antistatic properties overcomes a static problem in the thermal dye image receiver elements by properly balancing the conductivity between the two antistatic locations.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 21, 2011
    Inventors: Debasis Majumdar, James S. Honan, Charles H. Weidner
  • Patent number: 7910519
    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: Grant
    Filed: March 5, 2007
    Date of Patent: March 22, 2011
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Narasimharao Dontula
  • Publication number: 20110052843
    Abstract: An image receiving element is a composite of multiple layers on a support including, in order, an extruded compliant layer, an aqueous-coated subbing layer, and an image receiving layer that may also be extruded. The extruded compliant layer is non-voided and comprises from about 10 to about 40 weight % of at least one elastomeric polymer. This image receiving element can be disposed on a support to form a thermal dye transfer receiver element, an electrophotographic image receiver element, or a thermal wax receiver element. Excellent adhesion is provided between the extruded compliant layer and the image receiving layer by means of the aqueous-coated subbing layer.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 3, 2011
    Inventors: Narasimharao Dontula, Debasis Majumdar, Brian Thomas, Somsack Chang
  • Publication number: 20110027505
    Abstract: A thermal, non-silver halide-containing image receiver element includes a support and an aqueous-coated image receiving layer. This receiving layer comprises a water-dispersible polymer having a polyurea or polyurethane backbone and up to 25 weight % of the water-dispersible polymer comprising polysiloxane side chains that are covalently attached to the backbone, each of the side chains having a molecular weight of at least 500. Aqueous dispersions of polyester ionomers and crosslinking agents can also be present.
    Type: Application
    Filed: July 31, 2009
    Publication date: February 3, 2011
    Inventors: Debasis Majumdar, Teh-Ming Kung, Catherine Falkner, Yongcai Wang, Lenhard Cheryl, Paul Yacobucci
  • Patent number: 7850814
    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: October 23, 2008
    Date of Patent: December 14, 2010
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Glen C. Irvin, Jr., Charles C. Anderson, Lee W. Tutt, Gary S. Freedman, Leonard S. Gates
  • Patent number: 7829613
    Abstract: The present invention relates to a splayant, that is, an intercalant/exfoliant, comprising an azinium compound capable of splaying a layered material.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: November 9, 2010
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Deepak Shukla
  • Patent number: 7796123
    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 20, 2006
    Date of Patent: September 14, 2010
    Assignee: Eastman Kodak Company
    Inventors: Glen C. Irvin, Jr., Todd M. Spath, Charles C. Anderson, Lawrence A. Rowley, Debasis Majumdar
  • Publication number: 20100220074
    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 20, 2006
    Publication date: September 2, 2010
    Inventors: Glen C. Irvin, JR., Todd M. Spath, Charles C. Anderson, Lawrence A. Rowley, Debasis Majumdar
  • Patent number: 7781047
    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: October 21, 2004
    Date of Patent: August 24, 2010
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Glen C. Irvin, Jr., Charles C. Anderson, Lee W. Tutt, Gary S. Freedman, Leonard S. Gates
  • Publication number: 20100118243
    Abstract: A donor laminate for transfer of a conductive layer has a transparent substrate and a conductive layer comprising at least one electronically conductive polymer that is present in an amount of at least 40 weight %, a polyanion, and inorganic particles having an average particle size of less than 100 nanometers (nanoparticles). This donor laminate can be used to transfer the conductive layer to a suitable receiver element to prepare various electronic devices.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 13, 2010
    Inventors: Debasis Majumdar, Glen C. Irvin, JR., Lee W. Tutt, Gary S. Freedman
  • Publication number: 20100013874
    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: August 29, 2009
    Publication date: January 21, 2010
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Mitchell S. BURBERRY, David M. JOHNSON, Charles M. RANKIN, JR., Debasis MAJUMDAR
  • Patent number: 7645497
    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: Grant
    Filed: June 2, 2005
    Date of Patent: January 12, 2010
    Assignee: Eastman Kodak Company
    Inventors: Todd M. Spath, Glen C. Irvin, Jr., Debasis Majumdar, Ronald S. Cok, Charles C. Anderson
  • Patent number: 7632879
    Abstract: The present invention relates to a splayant, that is, an intercalant/exfoliant, comprising an azinium compound capable of splaying a layered material.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: December 15, 2009
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Deepak Shukla