Patents by Inventor Sridhar Sadasivan

Sridhar Sadasivan 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).

  • Publication number: 20030107637
    Abstract: An inkjet recording element comprising a support having thereon an image-receiving layer comprising non-silicon-containing inorganic oxide particles, the particles having their surfaces treated with a silane coupling agent having a hydrophilic, organic moiety.
    Type: Application
    Filed: December 12, 2001
    Publication date: June 12, 2003
    Applicant: Eastman Kodak Company
    Inventors: David M. Teegarden, Sridhar Sadasivan
  • Publication number: 20030107636
    Abstract: An ink jet printing method having the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with ink jet recording element having a substrate having thereon a porous image-receiving layer of a) organic particles encapsulated with an organic polymer having a Tg of less than about 100 ° C.; and b) water-insoluble, cationic, polymeric particles; C) loading the printer with an ink jet ink composition; and D) printing on the image-receiving layer using the inkjet ink composition in response to the digital data signals.
    Type: Application
    Filed: December 12, 2001
    Publication date: June 12, 2003
    Applicant: Eastman Kodak Company
    Inventors: Elizabeth A. Gallo, Sridhar Sadasivan, Xiaoru Wang
  • Publication number: 20030108691
    Abstract: An ink jet printing method having the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with ink jet recording element having a support having thereon an image-receiving layer of non-silicon-containing inorganic oxide particles, the particles having their surfaces treated with a silane coupling agent having a hydrophilic, organic moiety; C) loading the printer with an ink jet ink composition; and D) printing on the image-receiving layer using the ink jet ink composition in response to the digital data signals.
    Type: Application
    Filed: December 12, 2001
    Publication date: June 12, 2003
    Applicant: Eastman Kodak Company
    Inventors: David Teegarden, Sridhar Sadasivan
  • Publication number: 20030064204
    Abstract: A porous ink jet recording element having a support having thereon an image-receiving layer having: (a) inorganic particles having a primary particle size of from about 7 to about 40 nm in diameter which may be aggregated up to about 500 nm; (b) colloidal particles having a mean particle size of from about 20 to about 500 nm; (c) water-insoluble, cationic, polymeric particles having at least about 20 mole percent of a cationic mordant moiety; and (d) inorganic particles encapsulated with an organic polymer having a Tg of less than about 100° C.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 3, 2003
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Elizabeth A. Gallo, Lixin Chu, John M. Baier, David E. Decker, Xiaoru E. Wang
  • Publication number: 20030063176
    Abstract: An inkjet printing method having the steps of: I) providing an ink jet printer that is responsive to digital data signals; II) loading the printer with a porous ink jet recording element having a substrate having thereon a porous image-receiving layer having a) inorganic particles encapsulated with an organic polymer having a Tg of less than about 100° C.; and b) particles having a mean particle size of up to about 5 &mgr;m; III) loading the printer with an inkjet ink composition; and IV) printing on the image-receiving layer using the ink jet ink composition in response to the digital data signals.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 3, 2003
    Applicant: Eastman Kodak Company
    Inventors: Elizabeth A. Gallo, Sridhar Sadasivan, Xiaoru Wang
  • Publication number: 20030064203
    Abstract: An ink jet recording element having a substrate having thereon a porous image-receiving layer having a) inorganic particles encapsulated with an organic polymer having a Tg of less than about 100° C.; and b) particles having a mean particle size of up to about 5 &mgr;m.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 3, 2003
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Elizabeth A. Gallo, Xiaoru Wang
  • Publication number: 20030049416
    Abstract: An ink jet recording element comprising a support having thereon an image-receiving layer having: (a) inorganic particles having a primary particle size of from about 7 to about 40 nm in diameter which may be aggregated up to about 500 nm; (b) colloidal particles having a mean particle size of from about 20 to about 500 nm; and (c) water-insoluble, cationic, polymeric particles having at least about 20 mole percent of a cationic mordant moiety.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 13, 2003
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Lixin Chu, John M. Baier, Yongcai Wang, Lori J. Shaw-Klein, Elizabeth A. Gallo
  • Publication number: 20030049418
    Abstract: An ink jet recording element having a support having thereon a porous image-receiving layer having: (a) particles having a mean particle size of from greater than 0.04 &mgr;m to about 5 &mgr;m; and (b) water insoluble, cationic, polymeric particles having at least about 20 mole percent of a cationic mordant moiety.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 13, 2003
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Elizabeth A. Gallo, John M. Baier
  • Publication number: 20030044583
    Abstract: An ink jet recording element comprising a support having thereon a porous image-receiving layer comprising at least about 50% by weight of particles and less than about 20% by weight of a binder, the particles comprising a mixture of (a) inorganic particles having a primary particle size of from about 7 to about 40 nm in diameter which may be aggregated to provide a mean aggregate particle size of up to about 500 nm; and (b) colloidal particles having a mean particle size of from about 20 to about 500 nm; and wherein the difference between the mean aggregate particle size of the (a) inorganic particles and the mean particle size of the (b) colloidal particles is within about 10%.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 6, 2003
    Applicant: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Lixin Chu, John M. Baier, Elizabeth A. Gallo
  • Patent number: 6527388
    Abstract: An ink jet printing method having the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with ink jet recording element having a support having thereon in order: (I) a base layer of at least about 50% by weight of inorganic particles; and (II) an image-receiving layer of a) colloidal, inorganic oxide particles having a mean particle size of from about 10 to about 500 nm; and (b) water-insoluble, cationic, polymeric particles having a benzyldimethyl benzylammonium moiety, C) loading the printer with an ink jet ink composition, and D) printing on the image-receiving layer using the ink jet ink.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: March 4, 2003
    Assignee: Eastman Kodak Company
    Inventors: Yongcai Wang, Lori J. Shaw-Klein, Thomas P. Nicholas, Sridhar Sadasivan, Lixin Chu
  • Publication number: 20030030706
    Abstract: A method and apparatus for delivering a functional material to a receiver includes a pressurized source of solvent in a thermodynamically stable mixture with a functional material. The solvent is in a liquid state within the pressurized source. A discharge device having an inlet and an outlet is connected to the pressurized source at the inlet such that the thermodynamically stable mixture is ejected from the outlet. A receiver having a back is positioned a predetermined distance from the outlet of the discharge device. The solvent of the thermodynamically mixture evaporates at a location beyond the outlet of the discharge device and a predetermined amount of the functional material contacts the receiver at a predetermined distance from the back of the receiver.
    Type: Application
    Filed: July 12, 2001
    Publication date: February 13, 2003
    Applicant: Eastman Kodak Company
    Inventors: Ramesh Jagannathan, Glen C. Irvin, Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, John E. Rueping, Gary E. Merz
  • Patent number: 6514601
    Abstract: An ink jet recording element comprising a support having thereon a porous image-receiving layer comprising at least about 90% by weight of particles and less than about 10% by weight of a binder, the image-receiving layer also containing a nonionic surfactant having an HLB number of less than about 10 in an amount to substantially prevent foaming of the coating composition which is used to coat the support with the image-receiving layer.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 4, 2003
    Assignee: Eastman Kodak Company
    Inventors: Sridhar Sadasivan, Lloyd A. Lobo, John M. Baier
  • Patent number: 6471327
    Abstract: An apparatus and method of focusing a functional material is provided. The apparatus includes a pressurized source of fluid in a thermodynamically stable mixture with a functional material. A discharge device having an inlet and an outlet is connected to the pressurized source at the inlet. The discharge device is shaped to produce a collimated beam of functional material, where the fluid is in a gaseous state at a location before or beyond the outlet of the discharge device. The fluid can be one of a compressed liquid and a supercritical fluid. The thermodynamically stable mixture includes one of the functional material being dispersed in the fluid and the functional material being dissolved in the fluid.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: October 29, 2002
    Assignee: Eastman Kodak Company
    Inventors: Ramesh Jagannathan, Glen C. Irvin, Jr., Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, John E. Rueping, Gary E. Merz
  • Publication number: 20020155260
    Abstract: An ink jet recording element having a substrate having thereon an image-receiving layer of a filler and coated particles of a polymeric hard core-polymeric soft shell, the Tg of the polymeric hard core material being greater than about 60° C., the Tg of the polymeric soft shell material being less than about 100° C., and the filler being present in the image-receiving layer in an amount of from about 50 to about 95% by weight, the substrate being paper, resin-coated paper, synthetic paper, impregnated paper, cellulose acetate or a polyester film.
    Type: Application
    Filed: March 25, 2002
    Publication date: October 24, 2002
    Applicant: Eastman Kodak Company
    Inventors: Tienteh Chen, Lixin Chu, Sridhar Sadasivan, Elizabeth A. Gallo, Xiaoru Wang
  • Patent number: 6447882
    Abstract: An ink jet recording element comprising a substrate having thereon an image-receiving layer comprising an inorganic, anionic pigment, an organic, anionic binder and an organic, cationic mordant, and a porous overcoat layer located over the image-receiving layer, the porous overcoat layer comprising an inorganic pigment and an organic, anionic, binder, wherein the refractive index of the inorganic pigment in the overcoat layer is at least 0.05 refractive index units less than the refractive index of the inorganic, anionic pigment in the image-receiving layer.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: September 10, 2002
    Assignee: Eastman Kodak Company
    Inventors: Suresh Sunderrajan, Sridhar Sadasivan, Patrick J. Whittaker, John W. Jannsen
  • Patent number: 6447110
    Abstract: An ink jet printing method having the steps of: I) providing an ink jet printer that is responsive to digital data signals; II) loading the printer with ink jet recording element having a support having thereon an image-receiving layer having: (a) inorganic particles having a primary particle size of from about 7 to about 40 nm in diameter which may be aggregated up to about 500 nm; (b) colloidal particles having a mean particle size of from about 20 to about 500 nm; and (c) water-insoluble, cationic, polymeric particles having at least about 20 mole percent of a cationic mordant moiety; III) loading the printer with an ink jet ink composition; and IV) printing on the image-receiving layer using the ink jet ink composition in response to the digital data signals.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 10, 2002
    Assignee: Eastman Kodak Company
    Inventors: Lixin Chu, Sridhar Sadasivan, John M. Baier, Yongcai Wang, Lori J. Shaw-Klein, Elizabeth A. Gallo
  • Patent number: 6447114
    Abstract: An ink jet printing method comprising the steps of: a) providing an ink jet printer that is responsive to digital data signals; b) loading the printer with an ink jet recording element comprising a substrate having thereon an image-receiving layer comprising an inorganic, anionic pigment, an organic, anionic binder and an organic, cationic mordant, and a porous overcoat layer located over the image-receiving layer, the porous overcoat layer comprising an inorganic pigment and an organic, anionic, binder, wherein the refractive index of the inorganic pigment in the overcoat layer is at least 0.05 refractive index units less than the refractive index of the inorganic, anionic pigment in the image-receiving layer; c) loading the printer with an ink jet ink composition; and d) printing on the recording element using the ink jet ink in response to the digital data signals.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: September 10, 2002
    Assignee: Eastman Kodak Company
    Inventors: Suresh Sunderrajan, Sridhar Sadasivan, Patrick J. Whittaker, John W. Janssen
  • Patent number: 6447111
    Abstract: An ink jet printing method having the steps of: I) providing an ink jet printer that is responsive to digital data signals; II) loading the printer with a porous ink jet recording element having a support having thereon an image-receiving layer having: (a) inorganic particles having a primary particle size of from about 7 to about 40 nm in diameter which may be aggregated up to about 500 nm; (b) colloidal particles having a mean particle size of from about 20 to about 500 nm; (c) water-insoluble, cationic, polymeric particles having at least about 20 mole percent of a cationic mordant moiety; and (d) inorganic particles encapsulated with an organic polymer having a Tg of less than about 100° C.; III) loading the printer with an ink jet ink composition; and IV) printing on the image-receiving layer using the ink jet ink composition in response to the digital data signals.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 10, 2002
    Assignee: Eastman Kodak Company
    Inventors: Elizabeth A. Gallo, Lixin Chu, Sridhar Sadasivan, John M. Baier, David E. Decker, Xiaoru E. Wang
  • Patent number: 6443570
    Abstract: An ink jet printing method having the steps of: I) providing an ink jet printer that is responsive to digital data signals; II) loading the printer with an ink jet recording element having a support having thereon a porous image-receiving layer having at least about 50% by weight of particles and less than about 20% by weight of a binder, the particles comprising a mixture of (a) inorganic particles having a primary particle size of from about 7 to about 40 nm in diameter which may be aggregated to provide a mean aggregate particle size of up to about 500 nm; and (b) colloidal particles having a mean particle size of from about 20 to about 500 nm; and wherein the difference between the mean aggregate particle size of the (a) inorganic particles and the mean particle size of the (b) colloidal particles is within about 10%; III) loading the printer with an ink jet ink composition; and IV) printing on the image-receiving layer using the ink jet ink composition in response to the digital data signals.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 3, 2002
    Assignee: Eastman Kodak Company
    Inventors: Lixin Chu, Sridhar Sadasivan, John M. Baier, Elizabeth A. Gallo
  • Publication number: 20020118246
    Abstract: An apparatus and method of delivering a functional material is provided. The apparatus includes a pressurized source of fluid in a thermodynamically stable mixture with a functional material. A discharge device having an inlet and an outlet is connected to the pressurized source at the inlet. The discharge device is shaped to produce a collimated beam of functional material, where the fluid is in a gaseous state at a location before or beyond the outlet of the discharge device. A beam control device is positioned proximate to the outlet of the discharge device such that the collimated beam of functional material is controlled after the collimated beam of functional material moves through the outlet of the discharge device.
    Type: Application
    Filed: March 6, 2002
    Publication date: August 29, 2002
    Applicant: Eastman Kodak Company
    Inventors: Ramesh Jagannathan, Glen C. Irvin, Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, John E. Rueping, Gary E. Merz