Patents by Inventor Narasimharao Dontula

Narasimharao Dontula 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).

  • Process to make a sheet material with cells and voids
    Publication number: 20030203184
    Abstract: A method of forming a sheet comprising extruding a polymer material comprising an incompatible material and a foaming agent, cooling the extruded material, stretching said extruded material in at least one direction.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Inventors: Suresh Sunderrajan, Narasimharao Dontula, Thaddeus S. Gula, William A. Mruk, Sandra J. Dagan, Peter T. Aylward, Richard D. Bomba, Terry A. Heath, Edward A. Colombo
  • Imaging element having improved crack propagation during conversion
    Publication number: 20030152760
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, wherein said foam core sheet has a modulus of between 100 and 2758 MPa and a tensile toughness between 0.344 and 35 MPa, and wherein said upper and lower flange sheet has a modulus of between and 1380 and 20000 MPa and a toughness between 1.4 and 210 MPa.
    Type: Application
    Filed: September 30, 2002
    Publication date: August 14, 2003
    Applicant: Eastman Kodak Company
    Inventors: Yeh-Hung Lai, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk, Narasimharao Dontula, Gary D. Smith, YuanQiao Rao
  • Nacreous imaging element containing a voided polymer layer
    Patent number: 6596451
    Abstract: The invention relates to an imaging element comprising an imaging layer, a nacreous pigment, and at least one layer comprising voids.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: July 22, 2003
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Peter T. Aylward, Robert P. Bourdelais, Alphonse D. Camp
  • Imaging element having improved crack propagation during conversion
    Publication number: 20030129376
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, wherein said foam core sheet has a modulus of between 100 and 2758 MPa and a tensile toughness between 0.344 and 35 MPa, and wherein said upper and lower flange sheet has a modulus of between and 1380 and 20000 MPa and a toughness between 1.4 and 210 MPa.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 10, 2003
    Inventors: Yeh-Hung Lai, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk, Narasimharao Dontula, Gary D. Smith, YuanQiao Rao
  • Ethoxylated alcohol intercalated smectite materials and method
    Publication number: 20030099815
    Abstract: The invention relates to an article comprising ethoxylated alcohol wax intercalated in smectite clay. Embodiments of the invention comprise a sheet or an imaging member comprising an image layer and at least one layer comprising ethoxylated alcohol wax intercalated in smectite clay. The invention comprises a method of forming intercalated clay by providing smectite clay and combining the clay with ethoxylated alcohol wax and heating the mixture to above the softening point of the wax. The method further includes combining the intercalated clay with a polymer.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 29, 2003
    Applicant: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Thomas N. Blanton, Debasis Majumdar
  • Smectite clay intercalated with polyether block polyamide copolymer
    Publication number: 20030100656
    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: Application
    Filed: November 13, 2001
    Publication date: May 29, 2003
    Applicant: Eastman Kodak Company
    Inventors: Debasis Majumdar, Narasimharao Dontula, Thomas N. Blanton, Gary S. Freedman
  • Polyester nanocomposites
    Publication number: 20030100655
    Abstract: An article comprising a matrix polymer and clay wherein said clay is intercalated with a block copolymer, wherein said block copolymer comprises a hydrophilic block capable of intercalating said clay and a matrix compatible block compatible with said matrix polymer.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 29, 2003
    Applicant: Eastman Kodak Company
    Inventors: Mridula Nair, Narasimharao Dontula, Thomas N. Blanton, Jeffrey R. Gillmor, Debasis Majumdar
  • Oriented polyester imaging element with nacreous pigment
    Patent number: 6569593
    Abstract: This invention relates to an imaging element comprising at least one layer of oriented polyester and nacreous pigment.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: May 27, 2003
    Assignee: Eastman Kodak Company
    Inventors: Robert P. Bourdelais, Peter T. Aylward, Narasimharao Dontula, Alphonse D. Camp
  • Conductive foam core imaging member
    Patent number: 6566033
    Abstract: The invention relates to an imaging member and a method for use therewith comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, and wherein said imaging member has a stiffness of between 50 and 250 millinewtons and is conductive.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: May 20, 2003
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Narasimharao Dontula, Suresh Sunderrajan, Peter T. Aylward, Kelly S. Robinson, Melvin M. Kestner
  • Method for treatment of surfaces with ultraviolet light
    Patent number: 6565927
    Abstract: A method using irradiation with optical light having a wavelength of 160 to 500 nanometers without higher wavelengths with cooling of the surface during the irradiation to modify the surface (12A, 104A, 202A, 304A, 402A, 502A) of a substrate (12, 104, 202, 304, 402, 502) is described. The light is filtered or the lamp (24, 106, 212, 306, 510) is restricted to the limited range to avoid the affects of the higher spectra. The light can be pulsed or continuous. The method is significantly enhanced by the presence of water (14, 124, 204, 306, 410, 508) on the surface, preferably also in the presence of ozone in the water. The treated surfaces are more paintable and bondable.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: May 20, 2003
    Assignee: Board of Trustees of Michigan State University
    Inventors: Lawrence T. Drzal, Narasimharao Dontula, Richard L. Schalek, Alekh S. Bhurke, Michael J. Rich, Laura M. Fisher, Ming Xie
  • Imaging element with polymer nacreous layer
    Patent number: 6544713
    Abstract: The invention relates to an imaging element comprising at least one layer comprising nacreous pigment and polymer.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: April 8, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter T. Aylward, Narasimharao Dontula, Alphonse D. Camp, Robert P. Bourdelais
  • Nacreous imaging element containing a voided polymer layer
    Publication number: 20030059697
    Abstract: The invention relates to an imaging element comprising an imaging layer, a nacreous pigment, and at least one layer comprising voids.
    Type: Application
    Filed: August 16, 2001
    Publication date: March 27, 2003
    Applicant: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Peter T. Aylward, Robert P. Bourdelais, Alphonse D. Camp
  • Foam core imaging member
    Patent number: 6537656
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, and wherein said imaging member has a stiffness of between 50 and 250 millinewtons.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: March 25, 2003
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk
  • ORIENTED POLYESTER IMAGING ELEMENT WITH NACREOUS PIGMENT
    Publication number: 20030044737
    Abstract: This invention relates to an imaging element comprising at least one layer of oriented polyester and nacreous pigment.
    Type: Application
    Filed: August 16, 2001
    Publication date: March 6, 2003
    Applicant: Eastman Kodak Company
    Inventors: Robert P. Bourdelais, Peter T. Aylward, Narasimharao Dontula, Alphonse D. Camp
  • IMAGING ELEMENT WITH POLYMER NACREOUS LAYER
    Publication number: 20030039930
    Abstract: The invention relates to an imaging element comprising at least one layer comprising nacreous pigment and polymer.
    Type: Application
    Filed: August 16, 2001
    Publication date: February 27, 2003
    Applicant: Eastman Kodak Company
    Inventors: Peter T. Aylward, Narasimharao Dontula, Alphonse D. Camp, Robert P. Bourdelais
  • Foam core imaging member with glossy surface
    Patent number: 6514659
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet wherein said upper flange sheet comprises oriented polystyrene or polypropylene polymer wherein the modulus of said upper flange sheet is between 1000 and 3500 MPa and the roughness of the upper surface of said base is less than 0.4 &mgr;m Ra.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: February 4, 2003
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk
  • Oriented polyolefin imaging element with nacreous pigment
    Patent number: 6497998
    Abstract: The invention relates to an imaging element comprising at least one layer of oriented polyolefin and nacreous pigment.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: December 24, 2002
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Robert P. Bourdelais, Alphonse D. Camp, Peter T. Aylward
  • Imaging elements with nanocomposite containing supports
    Patent number: 6475696
    Abstract: The invention relates to an imaging member comprising an image layer and a support comprising at least one layer comprising an inorganic particle having an aspect ratio of at least 10 to 1, a lateral dimension of between 0.01 &mgr;m and 5 &mgr;m, and a vertical dimension between 0. 5 nm and 10 nm, and polymeric resin.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: November 5, 2002
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Narasimharao Dontula, Dennis J. Massa, Thomas N. Blanton, Jose L. Garcia, Eric E. Arrington, Thaddeus S. Gula
  • Foam core imaging element with improved optical performance
    Patent number: 6447976
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, and wherein said imaging member has a stiffness of between 50 and 250 millinewtons and at least one layer of said base comprises whitening agent and said element has L* of greater than 90.4.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: September 10, 2002
    Assignee: Eastman Kodak Company
    Inventors: Narasimharao Dontula, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk, Terry A. Heath
  • Imaging elements with nanocomposite containing supports
    Publication number: 20020123015
    Abstract: The invention relates to an imaging member comprising an image layer and a support comprising at least one layer comprising an inorganic particle having an aspect ratio of at least 10 to 1, a lateral dimension of between 0.01 &mgr;m and 5 &mgr;m, and a vertical dimension between 0.5 nm and 10 nm, and polymeric resin.
    Type: Application
    Filed: December 28, 2000
    Publication date: September 5, 2002
    Inventors: Debasis Majumdar, Narasimharao Dontula, Dennis J. Massa, Thomas N. Blanton, Jose L. Garcia, Eric E. Arrington, Thaddeus S. Gula