Patents by Inventor Syamal K. Ghosh
Syamal K. Ghosh 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: 20030153109Abstract: A method of making an organic layer from an organic material on a substrate which will form part of an organic light-emitting device, including the steps of providing a sublimable organic material in a powder form; providing a thermally conductive and non-sublimable ceramic material in a powder form; forming a mixture of the sublimable organic material powder and thermally conductive and non-sublimable ceramic material powder; placing such mixture into a die and using a punch to apply sufficient pressure to the heated mixture to cause the mixture of powders to consolidate into a solid pellet; and removing the pellet from the die.Type: ApplicationFiled: February 11, 2002Publication date: August 14, 2003Applicant: Eastman Kodak CompanyInventors: Syamal K. Ghosh, Donn B. Carlton, Tukaram K. Hatwar, Steven A. Van Slyke
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Patent number: 6578245Abstract: A method of making a print head (100) includes forming a body (110) having a closed base (120) and independent fluid containment compartments (220) formed about the closed base (120). A substantially planar piezoelectric transducer (80) comprising a slab (60) of piezoelectric material provides a means of enclosing each of the independent fluid containment compartments (220). Each of the independent compartments has operably associated therewith one of a plurality of first electrodes (20) arranged on a first surface (62) of the slab (60) of piezoelectric material and a portion of a second electrode (22) arranged on an opposite second surface (64). By applying a voltage to the first and second surface electrodes (20, 22) in a predetermined manner induces an electric field in a portion of the slab (60) of piezoelectric material and thereby forces fluid composition through the independent fluid containment compartment (220).Type: GrantFiled: May 18, 2000Date of Patent: June 17, 2003Assignee: Eastman Kodak CompanyInventors: Dilip K. Chatterjee, Edward P. Furlani, Syamal K. Ghosh
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Patent number: 6572810Abstract: A method of making an injection molded article, including the steps of: mixing at a temperature of at least 100° C. polymeric materials having a thermal conductivity in the range of 0.001 to 0.01 cal/cm-sec-° C. wherein the polymeric materials are selected from the group consisting of polyethylene, polystyrene, polyester, and polycarbonate or combinations thereof, and one or more materials selected from the group consisting of ceramics, ceramic composites, metals and metal alloys in a blended relationship to form a viscous phase mixture, the materials in the viscous phase mixture being selected so that when in a solid phase it has a density greater than 4 grams/cc and a thermal conductivity greater than 0.101 cal/cm-sec-° C. to form a feedstock; cooling the blended viscous phase mixture to form the feedstock; and using the feedstock in an injection molding machine to form the article.Type: GrantFiled: January 29, 2001Date of Patent: June 3, 2003Assignee: Eastman Kodak CompanyInventors: Dilip K. Chatterjee, Syamal K. Ghosh, Donn B. Carlton, Joseph A. Manico
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Publication number: 20030008071Abstract: A method of handling powders of organic materials in making an organic light-emitting device (OLED) is disclosed. The method includes forming solid pellets from powders of organic materials and using such pellets in a thermal physical vapor deposition source for making an organic layer on a structure which will form part of an OLED.Type: ApplicationFiled: July 3, 2001Publication date: January 9, 2003Applicant: Eastman Kodak CompanyInventors: Steven A. Van Slyke, Syamal K. Ghosh, Donn B. Carlton
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Publication number: 20020192392Abstract: A method of making a charge containing element including the steps of depositing and patterning a dielectric material on a surface wherein the dielectric material includes a metallo-organic component and a liquid component; and decomposing by laser light the deposited dielectric material to substantially evaporate the liquid component to cause the metallic portion of the metallo-organic component to react with oxygen causing the dielectric material to have charge-holding properties.Type: ApplicationFiled: April 27, 2001Publication date: December 19, 2002Applicant: Eastman Kodak CompanyInventors: Thomas N. Blanton, Syamal K. Ghosh, Donn B. Carlton, Dilip K. Chatterjee
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Publication number: 20020187254Abstract: A method of providing a hermetically sealed enclosure for a highly moisture sensitive electronic device including depositing an electrical conductor on the substrate which provides an electrical connection with the electronic device and depositing an electrically insulating thin layer over the electrical conductor; providing a low melting point indium metal or alloy in the form of a wire having diameter ranging from 1 mil to 10 mils on the electrically insulating thin layer on the substrate so that the wire is situated around the periphery of the electronic device; placing an ultrasonic horn over the cover plate so that ultrasonic energy can be delivered through the cover plate to the wire and applying a pressure between 20 and 100 psi; and providing an acoustic wave to melt the wire.Type: ApplicationFiled: May 8, 2001Publication date: December 12, 2002Applicant: Eastman Kodak CompanyInventors: Syamal K. Ghosh, Fugui He, Harold Moore
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Publication number: 20020171167Abstract: A method of making an injection molded article, including the steps of: mixing at a temperature of at least 100° C. polymeric materials having a thermal conductivity in the range of 0.001 to 0.01 cal/cm-sec-° C. wherein the polymeric materials are selected from the group consisting of polyethylene, polystyrene, polyester, and polycarbonate or combinations thereof, and one or more materials selected from the group consisting of ceramics, ceramic composites, metals and metal alloys in a blended relationship to form a viscous phase mixture, the materials in the viscous phase mixture being selected so that when in a solid phase it has a density greater than 4 grams/cc and a thermal conductivity greater than 0.101 cal/cm-sec-° C. to form a feedstock; cooling the blended viscous phase mixture to form the feedstock; and using the feedstock in an injection molding machine to form the article.Type: ApplicationFiled: January 29, 2001Publication date: November 21, 2002Applicant: Eastman Kodak CompanyInventors: Dilip K. Chatterjee, Syamal K. Ghosh, Donn B. Carlton, Joseph A. Manico
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Publication number: 20020145223Abstract: A method of making a feedstock for injection molding, including the steps of: mixing at a temperature of at least 100° C. polymeric materials having a thermal conductivity in the range of 0.001 to 0.01 cal/cm-sec-° C. wherein the polymeric materials are selected from the group consisting of polyethylene, polystyrene, polyester, and polycarbonate or combinations thereof, and one or more materials selected from the group consisting of ceramics, ceramic composites, metals and metal alloys in a blended relationship to form a viscous phase mixture, the materials in the viscous phase mixture being selected so that when in a solid phase it has a density greater than 4 grams/cc and a thermal conductivity greater than 0.101 cal/cm-sec-° C. and; cooling the blended viscous phase mixture to form the feedstock.Type: ApplicationFiled: January 26, 2001Publication date: October 10, 2002Applicant: Eastman Kodak CompanyInventors: Syamal K. Ghosh, Dilip Chatterjee, Donn B. Carlton
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Publication number: 20020145222Abstract: A method of making an injection molded article having a marbled appearance, including the steps of: mixing at a temperature of at least 100 degrees ° C. polymeric materials having a thermal conductivity in the range of 0.001 to 0.01 cal/cm-sec-° C. wherein the polymeric materials are selected from the group consisting of polyethylene, polystyrene, polyester, and polycarbonate or combinations thereof, and one or more materials selected from the group consisting of ceramics, ceramic composites, metals and metal alloys in a blended relationship to form a viscous phase mixture, the materials in the viscous phase mixture being selected so that when in a solid phase it has a density greater than 4 grams/cc and a thermal conductivity greater than 0.101 cal/cm-sec-° C. to form a feedstock; cooling the blended viscous phase mixture to form the feedstock; and using the feedstock in an injection molding machine having a zero compression screw to form the article.Type: ApplicationFiled: January 26, 2001Publication date: October 10, 2002Applicant: Eastman Kodak CompanyInventors: Donn B. Carlton, Dilip K. Chatterjee, Syamal K. Ghosh
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Patent number: 6367132Abstract: A method of making a print head (100) includes forming a body (110) having a closed base (120) and independent fluid containment compartments (220) formed about the closed base (120). A substantially planar piezoelectric transducer (80) comprising a slab (60) of piezoelectric material provides a means of enclosing each of the independent fluid containment compartments (220). Each of the independent compartments has operably associated therewith one of a plurality of first electrodes (20) arranged on a first surface (62) of the slab (60) of piezoelectric material and a portion of a second electrode (22) arranged on an opposite second surface (64). By applying a voltage to the first and second surface electrodes (20, 22) in a predetermined manner induces an electric field in a portion of the slab (60) of piezoelectric material and thereby forces fluid composition through the independent fluid containment compartment (220).Type: GrantFiled: August 31, 1998Date of Patent: April 9, 2002Assignee: Eastman Kodak CompanyInventors: Dilip K. Chatterjee, Edward P. Furlani, Syamal K. Ghosh
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Patent number: 6351879Abstract: A method of making a printing apparatus configured for drawing fluid from a fluid reservoir and then ejecting droplets of fluid onto a receiver to form an image include the steps of providing an orifice manifold having a plurality of orifices each one of which in fluid communications with one of a plurality of piezoelectric pumps.Type: GrantFiled: August 31, 1998Date of Patent: March 5, 2002Assignee: Eastman Kodak CompanyInventors: Edward P. Furlani, Syamal K. Ghosh, Dilip K. Chatterjee
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Publication number: 20010050451Abstract: A method for compounding gel-free injection molding feed stock for injection molding net-shape ceramic parts, including the steps of: mixing inorganic particles with non-gel forming water soluble organic binders having molecular weight between 1000 and 1,000,000 and that are between 0.5 weight % and 10 weight % based upon the inorganic particles, along with plasticizers, water and processing aids in a mixer to form a mixture, wherein the non-gel forming water soluble organic binders are composed of high and low molecular weight organic binders; compounding the mixed inorganic particles and the non-gel forming water soluble organic binders at a high temperature in the range of between 70° and 98° Centigrade, under shear force, to form a homogenous viscous slurry in the range of 5×103 and 7×104 Pa. sec at a shear rate of 10 sec−1; cooling the homogenous viscous slurry to room temperature to form a compounded solid mass.Type: ApplicationFiled: July 27, 2001Publication date: December 13, 2001Applicant: Eastman Kodak CompanyInventors: Syamal K. Ghosh, Donn B. Carlton
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Patent number: 6290339Abstract: A method of directing fluid between a reservoir and a micro-orifice manifold includes the step of providing a piezoelectric actuating element operably associated with independent fluid containment chambers of said manifold. The piezoelectric actuating element is activated by applying a voltage to electrodes which produces fluid flow by changing its geometry inside the reservoir in response to an applied voltage.Type: GrantFiled: July 22, 1998Date of Patent: September 18, 2001Assignee: Eastman Kodak CompanyInventors: Edward P. Furlani, Syamal K. Ghosh, Dilip K. Chatterjee
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Publication number: 20010015000Abstract: A method of making a print head (100) includes forming a body (110) having a closed base (120) and independent fluid containment compartments (220) formed about the closed base (120). A substantially planar piezoelectric transducer (80) comprising a slab (60) of piezoelectric material provides a means of enclosing each of the independent fluid containment compartments (220). Each of the independent compartments has operably associated therewith one of a plurality of first electrodes (20) arranged on a first surface (62) of the slab (60) of piezoelectric material and a portion of a second electrode (22) arranged on an opposite second surface (64). By applying a voltage to the first and second surface electrodes (20, 22) in a predetermined manner induces an electric field in a portion of the slab (60) of piezoelectric material and thereby forces fluid composition through the independent fluid containment compartment (220).Type: ApplicationFiled: August 31, 1998Publication date: August 23, 2001Inventors: DILIP K. CHATTERJEE, EDWARD P. FURLANI, SYAMAL K. GHOSH
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Patent number: 6277007Abstract: An apparatus (10) and method for conveying abrasive web (16), such as photographic media, has a pair of closely spaced rollers (12, 14) through which the abrasive web (16) is conveyed while in contact with a coated media bearing surface (80, 90). The media bearing surface (80, 90) comprising a composite coating or a thin inorganic coating.Type: GrantFiled: August 5, 1999Date of Patent: August 21, 2001Assignee: Eastman Kodak CompanyInventors: Syamal K. Ghosh, Edward P. Furlani, Dilip K. Chatterjee
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Patent number: 6277006Abstract: An apparatus (10) and method for conveying abrasive web (16), such as photographic media, has a pair of closely spaced rollers (12, 14) through which the abrasive web (16) is conveyed while in contact with a coated media bearing surface (80, 90). The media bearing surface (80, 90) comprising a composite coating or a thin inorganic coating.Type: GrantFiled: May 21, 1998Date of Patent: August 21, 2001Assignee: Eastman Kodak CompanyInventors: Syamal K. Ghosh, Edward P. Furlani, Dilip K. Chatterjee
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Patent number: 6267464Abstract: Ink jet cartridge for an ink jet printer including an orifice plate having a plurality of orifices for ink ejection; a cartridge for receiving a reservoir having ink which is adapted to be ejected through the orifices, the cartridge including a cleaning manifold having a plurality of inlet and outlet passages through which cleaning fluid can be applied so that such fluid is directed across the surface of the orifice plate; and a plurality of actuable ultrasonic transducers disposed in operative relationship with respect to the orifice plate and which when actuated produce ultrasonic sound waves which impinge upon the orifice plate to loosen debris whereby the cleaning fluid directed across the surface of the orifice plate carries away such loosened debris.Type: GrantFiled: December 28, 1998Date of Patent: July 31, 2001Assignee: Eastman Kodak CompanyInventors: Edward P. Furlani, Syamal K. Ghosh, Dilip K. Chatterjee
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Patent number: 6262519Abstract: A method of controlling fluid flow in a microfluidic process includes the step of providing a piezoelectric pumping apparatus (100) in fluid communications with the microfluidic process such as an ink jet printer and the like. The piezoelectric pumping apparatus (100) has a piezoelectric transducer (80) with a functionally gradient piezoelectric element (60) arranged in a fluid containment chamber (120) which fluidically communicates with the microfluidic process. The functionally gradient piezoelectric element (60) responds to a voltage applied by a power source (240) by either expanding to expel fluid from the microfluidic process or contracting to permit fluid to enter the fluid containment chamber (120) and thus the microfluidic process.Type: GrantFiled: June 19, 1998Date of Patent: July 17, 2001Assignee: Eastman Kodak CompanyInventors: Edward P. Furlani, Syamal K. Ghosh, Dilip K. Chatterjee
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Patent number: 6254819Abstract: A method of making an ink jet printer channel member for use in ink delivery includes molding piezoelectric ceramic powders into a slab in the green state having top and bottom surfaces, forming alternating grooves on the top and bottom surfaces of the green state slab which provides peaks and valleys in opposite sides of the green state slab, wherein the valleys in the top surface are disposed in an offset relationship to the peaks in the bottom surface, sintering and poling the grooved green state slab; and forming electrically conductive surfaces on the exposed top and bottom surfaces of the sintered state slab. A slot is then cut through the top conductive layer in each of the valleys in the top surface of the grooved sintered green state slab. An orifice plate is positioned over the conductive surface on the top peak surfaces of the slotted sintered slab and a substrate on the conductive surface on the bottom peak surfaces to produce the ink jet printer channel member.Type: GrantFiled: July 16, 1999Date of Patent: July 3, 2001Assignee: Eastman Kodak CompanyInventors: Dilip K. Chatterjee, Donn B. Carlton, David L. Sime, Syamal K. Ghosh
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Patent number: 6235233Abstract: An improved materials feeder equipment includes highly efficient, durable, and wear and abrasion resistant sliding contact elements. In particular, the equipment has a feeder box and a ware plate arranged for sliding contact, each having high precision tetragonal zirconia polycrystal (TZP) ceramic or, alternatively, zirconia-alumina composite.Type: GrantFiled: August 27, 1999Date of Patent: May 22, 2001Assignee: Eastman Kodak CompanyInventors: Dilip K. Chatterjee, Syamal K. Ghosh