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).

  • Patent number: 10048221
    Abstract: 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: Grant
    Filed: April 2, 2018
    Date of Patent: August 14, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
  • Publication number: 20180224399
    Abstract: 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: Application
    Filed: April 2, 2018
    Publication date: August 9, 2018
    Inventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
  • Patent number: 9945811
    Abstract: 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: Grant
    Filed: August 11, 2016
    Date of Patent: April 17, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
  • Patent number: 9895713
    Abstract: 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: Grant
    Filed: March 6, 2014
    Date of Patent: February 20, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Kathryn J. Wahl, Dmitri Y. Petrovykh, Nabil D. Bassim, Rhonda Michelle Stroud
  • Patent number: 9896593
    Abstract: 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: Grant
    Filed: January 3, 2014
    Date of Patent: February 20, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Kathryn J. Wahl, Dmitri Y. Petrovykh, Nabil D. Bassim, Rhonda Michelle Stroud
  • Publication number: 20180045678
    Abstract: 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: Application
    Filed: August 11, 2016
    Publication date: February 15, 2018
    Inventors: Walter J. Dressick, Scott A. Trammell, Lisa C. Shriver-Lake
  • Patent number: 9857293
    Abstract: 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: Grant
    Filed: November 18, 2016
    Date of Patent: January 2, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
  • Patent number: 9857294
    Abstract: 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: Grant
    Filed: November 18, 2016
    Date of Patent: January 2, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
  • Patent number: 9845409
    Abstract: 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: Grant
    Filed: July 26, 2016
    Date of Patent: December 19, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Melik C. Demirel
  • Patent number: 9840638
    Abstract: 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: Grant
    Filed: July 26, 2016
    Date of Patent: December 12, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Melik C. Demirel
  • Publication number: 20170200840
    Abstract: 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: Application
    Filed: March 27, 2017
    Publication date: July 13, 2017
    Inventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
  • Patent number: 9701865
    Abstract: 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: Grant
    Filed: July 26, 2016
    Date of Patent: July 11, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Melik C. Demirel
  • Patent number: 9608146
    Abstract: 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: Grant
    Filed: April 9, 2015
    Date of Patent: March 28, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Jasbinder S. Sanghera, Woohong Kim, Colin C. Baker, Jason D. Myers, Jesse A. Frantz
  • Publication number: 20170074785
    Abstract: 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: Application
    Filed: November 18, 2016
    Publication date: March 16, 2017
    Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
  • Publication number: 20170074825
    Abstract: 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: Application
    Filed: November 18, 2016
    Publication date: March 16, 2017
    Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
  • Publication number: 20170029658
    Abstract: 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: Application
    Filed: July 26, 2016
    Publication date: February 2, 2017
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Melik C. Demirel
  • Publication number: 20170029659
    Abstract: 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: Application
    Filed: July 26, 2016
    Publication date: February 2, 2017
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Melik C. Demirel
  • Patent number: 9557296
    Abstract: 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 selected from the group consisting of polar aprotic or protic solvents having a boiling point of at least 100° C., room temperature ionic liquids, and deep eutectic solvents.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: January 31, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Daniel Zabetakis, Scott A. Trammell, Walter J. Dressick, David A. Stenger, Jasenka Verbarg
  • Publication number: 20160333139
    Abstract: 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: Application
    Filed: July 26, 2016
    Publication date: November 17, 2016
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J. Dressick, Melik C. Demirel
  • Patent number: 9422448
    Abstract: 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: Grant
    Filed: September 5, 2013
    Date of Patent: August 23, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Walter J Dressick, Melik C. Demirel, Alok Singh