Patents by Inventor Walter J. Dressick
Walter J. Dressick 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: 20220190173Abstract: A composition of matter having a coated silicon substrate with multiple alternating layers of polydopamine and polyallylamine bound copper-indium-gallium oxide (CIGO) nanoparticles on the substrate. A related composition of matter having polyallylamine bound to CIGO nanoparticles to form PAH-coated CIGO nanoparticles. A related CIGO thin film made via conversion of layer-by-layer assembled CIGO nanoparticles and polyelectrolytes. CIGO nanoparticles are created via a flame-spray pyrolysis method using metal nitrate precursors, subsequently coated with polyallylamine (PAH), and dispersed in aqueous solution. Multilayer films are assembled by alternately dipping a substrate into a solution of either polydopamine or polystyrenesulfonate and then in the CIGO-PAH dispersion to fabricate CIGO films as thick as 1-2 microns.Type: ApplicationFiled: March 7, 2022Publication date: June 16, 2022Inventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
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Patent number: 11271124Abstract: A composition of matter having a coated silicon substrate with multiple alternating layers of polydopamine and polyallylamine bound copper-indium-gallium oxide (CIGO) nanoparticles on the substrate. A related composition of matter having polyallylamine bound to CIGO nanoparticles to form PAH-coated CIGO nanoparticles. A related CIGO thin film made via conversion of layer-by-layer assembled CIGO nanoparticles and polyelectrolytes. CIGO nanoparticles are created via a flame-spray pyrolysis method using metal nitrate precursors, subsequently coated with polyallylamine (PAH), and dispersed in aqueous solution. Multilayer films are assembled by alternately dipping a substrate into a solution of either polydopamine or polystyrenesulfonate and then in the CIGO-PAH dispersion to fabricate CIGO films as thick as 1-2 microns.Type: GrantFiled: December 18, 2019Date of Patent: March 8, 2022Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
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Publication number: 20200203541Abstract: A composition of matter having a coated silicon substrate with multiple alternating layers of polydopamine and polyallylamine bound copper-indium-gallium oxide (CIGO) nanoparticles on the substrate. A related composition of matter having polyallylamine bound to CIGO nanoparticles to form PAH-coated CIGO nanoparticles. A related CIGO thin film made via conversion of layer-by-layer assembled CIGO nanoparticles and polyelectrolytes. CIGO nanoparticles are created via a flame-spray pyrolysis method using metal nitrate precursors, subsequently coated with polyallylamine (PAH), and dispersed in aqueous solution. Multilayer films are assembled by alternately dipping a substrate into a solution of either polydopamine or polystyrenesulfonate and then in the CIGO-PAH dispersion to fabricate CIGO films as thick as 1-2 microns.Type: ApplicationFiled: December 18, 2019Publication date: June 25, 2020Inventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
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Patent number: 10048221Abstract: A method of detecting chlorate in soil includes contacting soil wetted with a solvent containing an electrically conductive salt with an electrode comprising layers of vanadium-substituted phosphomolybdate alternating with layers of para-rosaniline, and performing voltammetry with the electrode, wherein a catalytic reduction current indicates a likelihood of the presence or absence of chlorate in the soil. A system includes a potentiostat operably connected to the electrode and in communication with hardware and software sufficient to produce an output indicating a chlorate level in soil.Type: GrantFiled: April 2, 2018Date of Patent: August 14, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
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Publication number: 20180224399Abstract: A method of detecting chlorate in soil includes contacting soil wetted with a solvent containing an electrically conductive salt with an electrode comprising layers of vanadium-substituted phosphomolybdate alternating with layers of para-rosaniline, and performing voltammetry with the electrode, wherein a catalytic reduction current indicates a likelihood of the presence or absence of chlorate in the soil. A system includes a potentiostat operably connected to the electrode and in communication with hardware and software sufficient to produce an output indicating a chlorate level in soil.Type: ApplicationFiled: April 2, 2018Publication date: August 9, 2018Inventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
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Patent number: 9945811Abstract: A method of detecting chlorate in soil includes contacting soil wetted with a solvent containing an electrically conductive salt with an electrode comprising layers of vanadium-substituted phosphomolybdate alternating with layers of para-rosaniline, and performing voltammetry with the electrode, wherein a catalytic reduction current indicates a likelihood of the presence or absence of chlorate in the soil. A system includes a potentiostat operably connected to the electrode and in communication with hardware and software sufficient to produce an output indicating a chlorate level in soil.Type: GrantFiled: August 11, 2016Date of Patent: April 17, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
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Patent number: 9896593Abstract: A method, and an article made therefrom, of: contacting a substrate with a first solution of first polyelectrolyte chains to form a layer of the first polyelectrolyte on the substrate; and contacting the layer of the first polyelectrolyte with a second solution of second polyelectrolyte chains to form a layer of the second polyelectrolyte. The first polyelectrolyte has a polyanion or polycation chain. The second polyelectrolyte has a polyanion or polycation chain of a charge opposite to that of the first polyelectrolyte. The first solution or the second solution is an aggregate-forming solution comprising an ionic species having at least two discrete sites of a charge opposite to that of the polyelectrolyte chains in the aggregate-forming solution. The ionic species forms, via bridging interactions, aggregates of the polyelectrolyte chains that remain intact in the aggregate-forming solution during the contact.Type: GrantFiled: January 3, 2014Date of Patent: February 20, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Kathryn J. Wahl, Dmitri Y. Petrovykh, Nabil D. Bassim, Rhonda Michelle Stroud
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Patent number: 9895713Abstract: A method, and an article made therefrom, of: contacting a substrate with a first solution of a first polyelectrolyte polymer to form a layer of the first polyelectrolyte polymer on the substrate; and contacting the layer of the first polyelectrolyte polymer with a second solution of a second polyelectrolyte polymer to form a layer of the second polyelectrolyte polymer on the layer of the first polyelectrolyte polymer. The first polyelectrolyte is a polyanion or polycation polymer. The second polyelectrolyte is a polyanion or polycation polymer of a charge opposite to that of the first polyelectrolyte polymer. At least one of the first solution or the second solution is an aggregate-forming solution comprising an ionic species having at least two discrete sites of a charge opposite to that of the polyelectrolyte polymer in the aggregate-forming solution.Type: GrantFiled: March 6, 2014Date of Patent: February 20, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Kathryn J. Wahl, Dmitri Y. Petrovykh, Nabil D. Bassim, Rhonda Michelle Stroud
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Publication number: 20180045678Abstract: A method of detecting chlorate in soil includes contacting soil wetted with a solvent containing an electrically conductive salt with an electrode comprising layers of vanadium-substituted phosphomolybdate alternating with layers of para-rosaniline, and performing voltammetry with the electrode, wherein a catalytic reduction current indicates a likelihood of the presence or absence of chlorate in the soil. A system includes a potentiostat operably connected to the electrode and in communication with hardware and software sufficient to produce an output indicating a chlorate level in soil.Type: ApplicationFiled: August 11, 2016Publication date: February 15, 2018Inventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
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Patent number: 9857293Abstract: Described herein is an approach using inexpensive, disposable chemical sensor probes that can be mounted on a small unmanned aerial vehicles (UAVs) and used to analyze a site (such as one known or suspected to contain explosive residue, spilled material or contaminated soil) without the need for a person to conduct ground operations at the site. The method involves contacting a soil or a surface with a filter paper wetted with a solvent, then subjecting the filter paper to voltammetry and/or spectroscopy, thus detecting a possible variation indicative of one or more analytes, wherein the solvent is the deep eutectic solvent consisting of a mixture of ethylene glycol and choline chloride.Type: GrantFiled: November 18, 2016Date of Patent: January 2, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
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Patent number: 9857294Abstract: Described herein is an approach using inexpensive, disposable chemical sensor probes that can be mounted on a small unmanned aerial vehicles (UAVs) and used to analyze a site (such as one known or suspected to contain explosive residue, spilled material or contaminated soil) without the need for a person to conduct ground operations at the site. The method involves contacting a soil or a surface with a filter paper wetted with a solvent, then subjecting the filter paper to spectroscopy, thus detecting a possible variation indicative of one or more analytes, wherein the solvent is a deep eutectic solvents consisting of a mixture of ethylene glycol and choline chloride.Type: GrantFiled: November 18, 2016Date of Patent: January 2, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
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Patent number: 9845409Abstract: Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.Type: GrantFiled: July 26, 2016Date of Patent: December 19, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Melik C. Demirel
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Patent number: 9840638Abstract: Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.Type: GrantFiled: July 26, 2016Date of Patent: December 12, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Melik C. Demirel
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Publication number: 20170200840Abstract: A composition of matter and method of forming copper indium gallium sulfide (CIGS), copper indium gallium selenide (CIGSe), or copper indium gallium telluride thin film via conversion of layer-by-layer (LbL) assembled Cu—In—Ga oxide (CIGO) nanoparticles and polyelectrolytes. CIGO nanoparticles are created via a flame-spray pyrolysis method using metal nitrate precursors, subsequently coated with polyallylamine (PAH), and dispersed in aqueous solution. Multilayer films are assembled by alternately dipping a substrate into a solution of either polydopamine (PDA) or polystyrenesulfonate (PSS) and then in the CIGO-PAH dispersion to fabricate films as thick as 1-2 microns. After LbL deposition, films are oxidized to remove polymer and sulfurized, selenized, or tellurinized to convert CIGO to CIGS, CIGSe, or copper indium gallium telluride.Type: ApplicationFiled: March 27, 2017Publication date: July 13, 2017Inventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
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Patent number: 9701865Abstract: Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.Type: GrantFiled: July 26, 2016Date of Patent: July 11, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Melik C. Demirel
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Patent number: 9608146Abstract: A composition of matter and method of forming copper indium gallium sulfide (CIGS), copper indium gallium selenide (CIGSe), or copper indium gallium telluride thin film via conversion of layer-by-layer (LbL) assembled Cu—In—Ga oxide (CIGO) nanoparticles and polyelectrolytes. CIGO nanoparticles are created via a flame-spray pyrolysis method using metal nitrate precursors, subsequently coated with polyallylamine (PAH), and dispersed in aqueous solution. Multilayer films are assembled by alternately dipping a substrate into a solution of either polydopamine (PDA) or polystyrenesulfonate (PSS) and then in the CIGO-PAH dispersion to fabricate films as thick as 1-2 microns. After LbL deposition, films are oxidized to remove polymer and sulfurized, selenized, or tellurinized to convert CIGO to CIGS, CIGSe, or copper indium gallium telluride.Type: GrantFiled: April 9, 2015Date of Patent: March 28, 2017Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
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Publication number: 20170074785Abstract: Described herein is an approach using inexpensive, disposable chemical sensor probes that can be mounted on a small unmanned aerial vehicles (UAVs) and used to analyze a site (such as one known or suspected to contain explosive residue, spilled material or contaminated soil) without the need for a person to conduct ground operations at the site. The method involves contacting a soil or a surface with a filter paper wetted with a solvent, then subjecting the filter paper to spectroscopy, thus detecting a possible variation indicative of one or more analytes, wherein the solvent is a deep eutectic solvents consisting of a mixture of ethylene glycol and choline chloride.Type: ApplicationFiled: November 18, 2016Publication date: March 16, 2017Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
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Publication number: 20170074825Abstract: Described herein is an approach using inexpensive, disposable chemical sensor probes that can be mounted on a small unmanned aerial vehicles (UAVs) and used to analyze a site (such as one known or suspected to contain explosive residue, spilled material or contaminated soil) without the need for a person to conduct ground operations at the site. The method involves contacting a soil or a surface with a filter paper wetted with a solvent, then subjecting the filter paper to voltammetry and/or spectroscopy, thus detecting a possible variation indicative of one or more analytes, wherein the solvent is the deep eutectic solvent consisting of a mixture of ethylene glycol and choline chloride.Type: ApplicationFiled: November 18, 2016Publication date: March 16, 2017Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
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Publication number: 20170029658Abstract: Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.Type: ApplicationFiled: July 26, 2016Publication date: February 2, 2017Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Melik C. Demirel
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Publication number: 20170029659Abstract: Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.Type: ApplicationFiled: July 26, 2016Publication date: February 2, 2017Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Walter J. Dressick, Melik C. Demirel