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).
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Patent number: 9346974Abstract: The present disclosure is directed to transparent composites having anti-fogging properties and anti-fog coating compositions for providing anti-fogging properties. The anti-fogging layers can contain an adhesive polymer, a hard polymer, and a hydrophilic polymer, wherein the adhesive polymer, hard polymer, and hydrophilic polymers are different. In further embodiments, composites are described including a substrate layer; a first adhesive layer; a first transparent layer; a second adhesive layer; a second transparent layer; and an anti-fog layer.Type: GrantFiled: June 25, 2014Date of Patent: May 24, 2016Assignee: SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATIONInventors: Debasis Majumdar, Ryan C. Hirschey, John P. Russo, Gerard T. Buss
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Patent number: 9017927Abstract: A method of patterning a conductive polymer includes providing a conductive polymer layer coated over a first support followed by pattern-wise transferring a layer containing polyvinyl acetal from a second support onto the conductive polymer to form a mask with at least one opening. The masked conductive polymer is subjected to treatment through the opening that changes the conductivity of the conductive polymer by at least one order of magnitude in areas not covered by the mask.Type: GrantFiled: February 25, 2013Date of Patent: April 28, 2015Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Lawrence A. Rowley, Jayme Diniz Ribeiro, David Andrew Johnson, Todd Mathew Spath
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Publication number: 20150079863Abstract: The present disclosure is directed to composite or articles for protective clothing, which include an anti-static layer. The antistatic layer can 1), include an antistatic agent comprising an electronically conductive material, and the antistatic layer can have a visible light transmission of at least 70%; 2) the anti-static layer can have a surface electrical resistivity (SER), and/or a water electrode resistivity (WER) of no greater than 1011 ohms/square and a visible light transmission of at least 70%; or 3) the anti-static layer has an electrical resistivity, measured in ohms/square, which varies by no more than 1.5 order of magnitude over a range of relative humidity of 5% to 95%, and a visible light transmission of at least 70%.Type: ApplicationFiled: August 8, 2014Publication date: March 19, 2015Inventors: Debasis Majumdar, Ryan C. Hirschey, Jenna Reynolds
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Publication number: 20140377566Abstract: The present disclosure is directed to transparent composites having anti-fogging properties and anti-fog coating compositions for providing anti-fogging properties. The anti-fogging layers can contain an adhesive polymer, a hard polymer, and a hydrophilic polymer, wherein the adhesive polymer, hard polymer, and hydrophilic polymers are different. In further embodiments, composites are described including a substrate layer; a first adhesive layer; a first transparent layer; a second adhesive layer; a second transparent layer; and an anti-fog layer.Type: ApplicationFiled: June 25, 2014Publication date: December 25, 2014Inventors: Debasis Majumdar, Ryan C. Hirschey, John P. Russo, Gerard T. Buss
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Publication number: 20140332148Abstract: A laminate donor element can be used to transfer a composite of a metal grid and an electronically conductive polymer to a receiver sheet for use in various devices. The laminate donor element has a donor substrate, a metal grid that is disposed over only portions of the donor substrate, leaving portions of the substrate uncovered by the metal grid, and an electronically conductive polymer that covers the portions of the donor substrate that are uncovered by the metal grid. The composite of metal grid and electronically conductive polymer exhibits a peel force of less than or equal to 40 g/cm for separation from the donor substrate at room temperature. The resulting article has a substrate on which a reverse composite of the metal grid and electronically conductive polymer is disposed, which article can be incorporated into various devices.Type: ApplicationFiled: July 14, 2014Publication date: November 13, 2014Inventors: Debasis Majumdar, Roger Lee Klaus, Michael J. Corrigan
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Patent number: 8865298Abstract: A laminate donor element can be used to transfer a composite of a metal grid and an electronically conductive polymer to a receiver sheet for use in various devices. The laminate donor element has a donor substrate, a metal grid that is disposed over only portions of the donor substrate, leaving portions of the substrate uncovered by the metal grid, and an electronically conductive polymer that covers the portions of the donor substrate that are uncovered by the metal grid. The composite of metal grid and electronically conductive polymer exhibits a peel force of less than or equal to 40 g/cm for separation from the donor substrate at room temperature. The resulting article has a substrate on which a reverse composite of the metal grid and electronically conductive polymer is disposed, which article can be incorporated into various devices.Type: GrantFiled: June 29, 2011Date of Patent: October 21, 2014Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Roger Lee Klaus, Michael J. Corrigan
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Publication number: 20140239236Abstract: Graphite oxide can be converted to its reduced form (r-GO) using exposing UV radiation having a peak wavelength (?max) of less than 400 nm while being maintained at a temperature that is greater than room temperature. This conversion method is efficient and can be carried out with various forms of graphite oxide samples, below atmospheric pressure, or in a reducing environment.Type: ApplicationFiled: May 5, 2014Publication date: August 28, 2014Inventors: Deepak Shukla, Debasis Majumdar
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Publication number: 20140242525Abstract: A method of patterning a conductive polymer includes providing a conductive polymer layer coated over a first support followed by pattern-wise transferring a layer containing polyvinyl acetal from a second support onto the conductive polymer to form a mask with at least one opening. The masked conductive polymer is subjected to treatment through the opening that changes the conductivity of the conductive polymer by at least one order of magnitude in areas not covered by the mask.Type: ApplicationFiled: February 25, 2013Publication date: August 28, 2014Inventors: Debasis Majumdar, Lawrence A. Rowley, Jayme Diniz Ribeiro, David Andrew Johnson, Todd Mathew Spath
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Patent number: 8709194Abstract: A method of assembling an electronic device includes providing a transparent conductive polymer layer coated over a first support followed by pattern-wise forming a transparent mask with at least one opening over the conductive polymer. The masked conductive polymer is subjected to treatment through the opening that changes conductivity of the conductive polymer by at least one order of magnitude in areas not covered by the mask to form a first electronic component. The first electronic component having the mask is secured to a second electronic component, thereby forming the electronic device.Type: GrantFiled: February 25, 2013Date of Patent: April 29, 2014Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Lawrence A. Rowley, Jayme Diniz Ribeiro, David Andrew Johnson, Todd Mathew Spath
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Patent number: 8628840Abstract: A laminate donor element can be used to transfer a composite of a metal grid and an electronically conductive polymer to a receiver sheet for use in various devices. The laminate donor element has a donor substrate, a metal grid that is disposed over only portions of the donor substrate, leaving portions of the substrate uncovered by the metal grid, and an electronically conductive polymer that covers the portions of the donor substrate that are uncovered by the metal grid. The composite of metal grid and electronically conductive polymer exhibits a peel force of less than or equal to 40 g/cm for separation from the donor substrate at room temperature.Type: GrantFiled: June 29, 2011Date of Patent: January 14, 2014Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Roger Lee Klaus, Michael J. Corrigan
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Patent number: 8501666Abstract: 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: GrantFiled: February 17, 2011Date of Patent: August 6, 2013Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Teh-Ming Kung, Catherine A. Falkner, Yongcai Wang, Cheryl Lenhard, Paul D. Yacobucci
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Publication number: 20130180842Abstract: Graphite oxide can be converted to its reduced form (r-GO) using exposing radiation having a peak wavelength (?max) of less than 400 nm, and even less than 1 nm (X-rays). This conversion method is efficient and can be carried out with various forms of graphite oxide samples, with or without simultaneous application of heat, below atmospheric pressure, or in a reducing environment.Type: ApplicationFiled: January 18, 2012Publication date: July 18, 2013Inventors: Thomas Nelson Blanton, Debasis Majumdar, E. Steven Brandt, Deepak Shukla
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Patent number: 8450242Abstract: A thermal transfer donor element can be used to provide a clear protective overcoat on a thermal image receiver element from a thermal transferable protective clear film on the donor element. This thermal transferable protective clear film includes a transparent poly(vinyl acetal) binder to which are attached silicone groups to improve scratch resistance of the transferred protective overcoat. Such protective overcoats can also be applied over thermally transferred dye images.Type: GrantFiled: April 26, 2011Date of Patent: May 28, 2013Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Joseph Cashimere, Yongcai Wang
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Patent number: 8404332Abstract: 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: GrantFiled: July 31, 2009Date of Patent: March 26, 2013Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Teh-Ming Kung, Catherine A. Falkner, Yongcai Wang, Cheryl Lenhard, Paul D. Yacobucci
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Publication number: 20130004750Abstract: A laminate donor element can be used to transfer a composite of a metal grid and an electronically conductive polymer to a receiver sheet for use in various devices. The laminate donor element has a donor substrate, a metal grid that is disposed over only portions of the donor substrate, leaving portions of the substrate uncovered by the metal grid, and an electronically conductive polymer that covers the portions of the donor substrate that are uncovered by the metal grid. The composite of metal grid and electronically conductive polymer exhibits a peel force of less than or equal to 40 g/cm for separation from the donor substrate at room temperature.Type: ApplicationFiled: June 29, 2011Publication date: January 3, 2013Inventors: DEBASIS MAJUMDAR, ROGER LEE KLAUS, MICHAEL J. CORRIGAN
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Publication number: 20130004753Abstract: A laminate donor element can be used to transfer a composite of a metal grid and an electronically conductive polymer to a receiver sheet for use in various devices. The laminate donor element has a donor substrate, a metal grid that is disposed over only portions of the donor substrate, leaving portions of the substrate uncovered by the metal grid, and an electronically conductive polymer that covers the portions of the donor substrate that are uncovered by the metal grid. The composite of metal grid and electronically conductive polymer exhibits a peel force of less than or equal to 40 g/cm for separation from the donor substrate at room temperature. The resulting article has a substrate on which a reverse composite of the metal grid and electronically conductive polymer is disposed, which article can be incorporated into various devices.Type: ApplicationFiled: June 29, 2011Publication date: January 3, 2013Inventors: Debasis Majumdar, Roger Lee Klaus, Michael J. Corrigan
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Patent number: 8329616Abstract: 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: GrantFiled: March 31, 2010Date of Patent: December 11, 2012Assignee: Eastman Kodak CompanyInventors: Debasis Majumdar, Narasimharao Dontula, Kevin M. Ryan, Somsack Chang
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Patent number: 8304370Abstract: 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: GrantFiled: November 19, 2009Date of Patent: November 6, 2012Assignee: Eastman Kodak CompanyInventors: Teh-Ming Kung, Catherine A. Falkner, Yongcai Wang, Debasis Majumdar
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Publication number: 20120273122Abstract: A thermal transfer donor element can be used to provide a clear protective overcoat on a thermal image receiver element from a thermal transferable protective clear film on the donor element. This thermal transferable protective clear film includes a transparent poly(vinyl acetal) binder to which are attached silicone groups to improve scratch resistance of the transferred protective overcoat. Such protective overcoats can also be applied over thermally transferred dye images.Type: ApplicationFiled: April 26, 2011Publication date: November 1, 2012Inventors: Debasis Majumdar, Joseph Cashimere, Yongcai Wang
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Patent number: 8258078Abstract: 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: GrantFiled: August 27, 2009Date of Patent: September 4, 2012Assignee: Eastman Kodak CompanyInventors: Narasimharao Dontula, Debasis Majumdar, Brian Thomas, Somsack Chang