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).
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Publication number: 20030107637Abstract: 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: ApplicationFiled: December 12, 2001Publication date: June 12, 2003Applicant: Eastman Kodak CompanyInventors: David M. Teegarden, Sridhar Sadasivan
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Publication number: 20030107636Abstract: 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: ApplicationFiled: December 12, 2001Publication date: June 12, 2003Applicant: Eastman Kodak CompanyInventors: Elizabeth A. Gallo, Sridhar Sadasivan, Xiaoru Wang
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Publication number: 20030108691Abstract: 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: ApplicationFiled: December 12, 2001Publication date: June 12, 2003Applicant: Eastman Kodak CompanyInventors: David Teegarden, Sridhar Sadasivan
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Publication number: 20030064204Abstract: 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: ApplicationFiled: August 31, 2001Publication date: April 3, 2003Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Elizabeth A. Gallo, Lixin Chu, John M. Baier, David E. Decker, Xiaoru E. Wang
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Publication number: 20030063176Abstract: 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: ApplicationFiled: August 31, 2001Publication date: April 3, 2003Applicant: Eastman Kodak CompanyInventors: Elizabeth A. Gallo, Sridhar Sadasivan, Xiaoru Wang
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Publication number: 20030064203Abstract: 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: ApplicationFiled: August 31, 2001Publication date: April 3, 2003Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Elizabeth A. Gallo, Xiaoru Wang
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Publication number: 20030049416Abstract: 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: ApplicationFiled: August 31, 2001Publication date: March 13, 2003Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Lixin Chu, John M. Baier, Yongcai Wang, Lori J. Shaw-Klein, Elizabeth A. Gallo
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Publication number: 20030049418Abstract: 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: ApplicationFiled: August 31, 2001Publication date: March 13, 2003Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Elizabeth A. Gallo, John M. Baier
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Publication number: 20030044583Abstract: 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: ApplicationFiled: August 31, 2001Publication date: March 6, 2003Applicant: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Lixin Chu, John M. Baier, Elizabeth A. Gallo
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Patent number: 6527388Abstract: 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: GrantFiled: December 12, 2001Date of Patent: March 4, 2003Assignee: Eastman Kodak CompanyInventors: Yongcai Wang, Lori J. Shaw-Klein, Thomas P. Nicholas, Sridhar Sadasivan, Lixin Chu
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Publication number: 20030030706Abstract: 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: ApplicationFiled: July 12, 2001Publication date: February 13, 2003Applicant: Eastman Kodak CompanyInventors: Ramesh Jagannathan, Glen C. Irvin, Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, John E. Rueping, Gary E. Merz
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Patent number: 6514601Abstract: 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: GrantFiled: May 7, 2001Date of Patent: February 4, 2003Assignee: Eastman Kodak CompanyInventors: Sridhar Sadasivan, Lloyd A. Lobo, John M. Baier
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Patent number: 6471327Abstract: 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: GrantFiled: February 27, 2001Date of Patent: October 29, 2002Assignee: Eastman Kodak CompanyInventors: Ramesh Jagannathan, Glen C. Irvin, Jr., Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, John E. Rueping, Gary E. Merz
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Publication number: 20020155260Abstract: 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: ApplicationFiled: March 25, 2002Publication date: October 24, 2002Applicant: Eastman Kodak CompanyInventors: Tienteh Chen, Lixin Chu, Sridhar Sadasivan, Elizabeth A. Gallo, Xiaoru Wang
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Patent number: 6447882Abstract: 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: GrantFiled: February 28, 2000Date of Patent: September 10, 2002Assignee: Eastman Kodak CompanyInventors: Suresh Sunderrajan, Sridhar Sadasivan, Patrick J. Whittaker, John W. Jannsen
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Patent number: 6447110Abstract: 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: GrantFiled: August 31, 2001Date of Patent: September 10, 2002Assignee: Eastman Kodak CompanyInventors: Lixin Chu, Sridhar Sadasivan, John M. Baier, Yongcai Wang, Lori J. Shaw-Klein, Elizabeth A. Gallo
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Patent number: 6447114Abstract: 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: GrantFiled: February 28, 2000Date of Patent: September 10, 2002Assignee: Eastman Kodak CompanyInventors: Suresh Sunderrajan, Sridhar Sadasivan, Patrick J. Whittaker, John W. Janssen
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Patent number: 6447111Abstract: 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: GrantFiled: August 31, 2001Date of Patent: September 10, 2002Assignee: Eastman Kodak CompanyInventors: Elizabeth A. Gallo, Lixin Chu, Sridhar Sadasivan, John M. Baier, David E. Decker, Xiaoru E. Wang
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Patent number: 6443570Abstract: 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: GrantFiled: August 31, 2001Date of Patent: September 3, 2002Assignee: Eastman Kodak CompanyInventors: Lixin Chu, Sridhar Sadasivan, John M. Baier, Elizabeth A. Gallo
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Publication number: 20020118246Abstract: 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: ApplicationFiled: March 6, 2002Publication date: August 29, 2002Applicant: Eastman Kodak CompanyInventors: Ramesh Jagannathan, Glen C. Irvin, Seshadri Jagannathan, Sridhar Sadasivan, Suresh Sunderrajan, John E. Rueping, Gary E. Merz