Patents by Inventor Edward G. Zwartz

Edward G. Zwartz 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).

  • Publication number: 20240326292
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using powder particulates comprising a thermoplastic polymer and piezoelectric particles, wherein the piezoelectric particles are located (i) in the thermoplastic polymer at an outer surface of the powder particulates, (ii) within a core of the powder particulates, or (iii) combinations thereof. Additive manufacturing processes, such as powder bed fusion of powder particulates, may be employed to form printed objects in a range of shapes from the powder particulates. Melt emulsification may be used to form the powder particulates.
    Type: Application
    Filed: July 18, 2022
    Publication date: October 3, 2024
    Applicant: Xerox Corporation
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ
  • Publication number: 20240102186
    Abstract: A composition, a gas diffusion electrode, and a method for fabricating the same is disclosed. In an example, the composition includes carbon supported carboxyl surface functionalized silver nanoparticles. The gas diffusion electrode can be fabricated with the carbon supported carboxyl surface functionalized silver nanoparticles and deployed in a membrane electrode assembly for various applications.
    Type: Application
    Filed: September 22, 2022
    Publication date: March 28, 2024
    Inventors: Yujie Zhu, Yulin Wang, Robert Claridge, Edward G. Zwartz, Kurt I. Halfyard, David Lawton
  • Publication number: 20240010850
    Abstract: A gas diffusion electrode and a method for fabricating the same is disclosed. The gas diffusion electrode can be deployed in a membrane electrode assembly for various applications. In an example, the method to fabricate the gas diffusion electrode includes preparing an ink comprising carbon supported surface functionalized silver nanoparticles and depositing the ink on an electrically conductive surface.
    Type: Application
    Filed: July 6, 2022
    Publication date: January 11, 2024
    Inventors: Yujie Zhu, Yulin Wang, Kurt I. Halfyard, Edward G. Zwartz, Robert Claridge, Benjamin Knapik, David Lawton
  • Patent number: 11866562
    Abstract: Melt emulsification may be employed to form elastomeric particulates in a narrow size range when nanoparticles are included as an emulsion stabilizer. Such processes may comprise combining a polyurethane polymer and nanoparticles with a carrier fluid at a heating temperature at or above a melting point or a softening temperature of the polyurethane polymer, applying sufficient shear to disperse the polyurethane polymer as liquefied droplets in the presence of the nanoparticles in the carrier fluid at the heating temperature, cooling the carrier fluid at least until elastomeric particulates in a solidified state form, and separating the elastomeric particulates from the carrier fluid. In the elastomeric particulates, the polyurethane polymer defines a core and an outer surface of the elastomeric particulates and the nanoparticles are associated with the outer surface. The elastomeric particulates may have a D50 of about 1 ?m to about 1,000 ?m.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: January 9, 2024
    Assignee: Xerox Corporation
    Inventors: Cristina Resetco, Shivanthi Easwari Sriskandha, Edward G. Zwartz, Michael S. Hawkins, Valerie M. Farrugia
  • Patent number: 11851536
    Abstract: A process including combining polystyrene and a first solvent to form a polystyrene solution; heating the polystyrene solution; adding a second solvent to the polystyrene solution with optional stirring whereby polystyrene microparticles are formed via microprecipitation; optionally, cooling the formed polystyrene microparticles in solution; and optionally, removing the first solvent and second solvent. A polystyrene microparticle formed by a microprecipitation process, wherein the polystyrene particle has a spherical morphology, a particle diameter of greater than about 10 micrometers, and a weight average molecular weight of from about 38,000 to about 200,000 Daltons. A method of selective laser sintering including providing polystyrene microparticles formed by a microprecipitation process; and exposing the microparticles to a laser to fuse the microparticles.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: December 26, 2023
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Edward G. Zwartz, Sandra J. Gardner
  • Publication number: 20230395911
    Abstract: An electrochemical device including a first substrate layer is disclosed. The electrochemical device also includes an anode disposed upon the first substrate layer. The device also includes a second substrate layer. The electrochemical device also includes a cathode disposed upon the second substrate layer and an electrolyte composition disposed between and in contact with the anode and the cathode. The electrochemical device also includes an extruded sealing layer composition disposed between the first substrate layer and the second substrate layer. A sealing layer composition and a method of producing a sealing layer is also disclosed.
    Type: Application
    Filed: June 7, 2022
    Publication date: December 7, 2023
    Applicant: XEROX CORPORATION
    Inventors: Nan-Xing Hu, Naveen Chopra, Gregory McGuire, Edward G. Zwartz, Valerie M. Farrugia
  • Publication number: 20230395913
    Abstract: An electrochemical device is disclosed, including a first substrate layer. The electrochemical device also includes an anode disposed upon the first substrate layer. The device also includes a second substrate layer. The electrochemical device also includes a cathode disposed upon the second substrate layer, and an electrolyte composition disposed between and in contact with the anode and the cathode. The electrochemical device also includes a sealing layer which may include a 3D-printed sealing layer composition disposed between the first substrate layer and the second substrate layer. A 3D-printed sealing layer and a method of producing a sealing layer is disclosed.
    Type: Application
    Filed: June 7, 2022
    Publication date: December 7, 2023
    Applicant: XEROX CORPORATION
    Inventors: Naveen Chopra, Gregory McGuire, Edward G. Zwartz, Nan-Xing Hu
  • Publication number: 20230357566
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a polymer matrix comprising a first polymer material and a second polymer material that are immiscible with each other, and a plurality of piezoelectric particles located in at least a portion of the polymer matrix. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.
    Type: Application
    Filed: March 22, 2022
    Publication date: November 9, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET, Silvio E. KRUGER, Mohammad RAFIEE, Yujie ZHANG, Thomas LACELLE, Derek ARANGUREN VAN EGMOND, Claudie ROY
  • Publication number: 20230282879
    Abstract: An electrochemical device is disclosed, which includes an anode and a cathode. The electrochemical device also includes an extruded electrolyte composition disposed between the anode and the cathode. The cathode and/or the anode of the electrochemical device may be disposed in a stacked geometry or in a lateral x-y plane geometry. The electrolyte composition may include a gel polymer electrolyte. The electrolyte composition is disposed between the anode and the cathode in a laterally non-continuous pattern. A method of producing an electrolyte layer of an electrochemical device is also disclosed.
    Type: Application
    Filed: March 1, 2022
    Publication date: September 7, 2023
    Applicant: XEROX CORPORATION
    Inventors: Naveen CHOPRA, Gregory McGUIRE, Edward G. ZWARTZ, Nan-Xing HU
  • Publication number: 20230212405
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles and a polymer material comprising at least one thermoplastic polymer and at least one thermally curable polymer precursor. At a sufficient temperature, the at least one thermally curable polymer precursor may undergo a reaction, optionally also undergoing a reaction with the piezoelectric particles, and form an at least partially cured printed part. The piezoelectric particles may be mixed with the polymer material and remain substantially non-agglomerated when combined with the polymer material.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 6, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Publication number: 20230193471
    Abstract: Two-dimensional conductive nanoparticles may facilitate preparation of metal coatings prepared via electroless plating. Articles having a metal coating may comprise: a polymer body, and a metal coating on at least a portion of an outer surface of the polymer body. The metal coating comprises a plating metal and overlays a plurality of two-dimensional conductive nanoparticles and a catalyst metal.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 22, 2023
    Applicant: Xerox Corporation
    Inventors: Nan-Xing HU, Yulin WANG, Edward G. ZWARTZ
  • Publication number: 20230193054
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions that are extrudable and comprise a plurality of piezoelectric particles and a plurality of carbon nanomaterials dispersed in at least a portion of a polymer material. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer material. The polymer material may comprise at least one thermoplastic polymer, optionally further containing at least one polymer precursor. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.
    Type: Application
    Filed: March 22, 2022
    Publication date: June 22, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Publication number: 20230182363
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles dispersed in at least a portion of a polymer matrix comprising first polymer material and a sacrificial material, the sacrificial material being removable from the polymer matrix to define a plurality of pores in the polymer matrix. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The sacrificial material may comprise a second polymer material. The compositions may define a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes may comprise forming a printed part by depositing the compositions layer-by-layer and introducing porosity therein.
    Type: Application
    Filed: March 22, 2022
    Publication date: June 15, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Patent number: 11667788
    Abstract: Melt emulsification may be employed to form elastomeric particulates in a narrow size range when nanoparticles and a sulfonate surfactant are included as emulsion stabilizers. Such processes may comprise combining a polyurethane polymer, a sulfonate surfactant, and nanoparticles with a carrier fluid at a heating temperature at or above a melting point or softening temperature of the polyurethane polymer, applying sufficient shear to disperse the polyurethane polymer as liquefied droplets in the presence of the nanoparticles in the carrier fluid at the heating temperature, cooling the carrier fluid at least until elastomeric particulates in a solidified state form, and separating the elastomeric particulates from the carrier fluid. The polyurethane polymer defines a core and an outer surface of the elastomeric particulates, and the nanoparticles are associated with the outer surface. The elastomeric particulates may have a span of about 0.9 or less.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 6, 2023
    Assignee: Xerox Corporation
    Inventors: Robert Claridge, Cristina Resetco, Shivanthi Easwari Sriskandha, Valerie M. Farrugia, Edward G. Zwartz
  • Publication number: 20230150202
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a polymer material comprising at least one thermoplastic polymer, and a plurality of piezoelectric covalently bonded to the at least one thermoplastic polymer and dispersed in at least a portion of the polymer material. The compositions are extrudable and may be pre-formed into a form factor suitable for extrusion. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.
    Type: Application
    Filed: March 22, 2022
    Publication date: May 18, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Publication number: 20230151210
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a polymer matrix comprising a first polymer material and a second polymer material that are immiscible with each other, and a plurality of piezoelectric particles substantially localized in one of the first polymer material or the second polymer material. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The compositions may define a form factor such as a composite filament, a composite pellet, or an extrudable composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.
    Type: Application
    Filed: March 22, 2022
    Publication date: May 18, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Publication number: 20230150188
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles non-covalently interacting with at least a portion of a polymer material via ?-? bonding, hydrogen bonding, electrostatic interactions stronger than van der Waals interactions, or any combination thereof. The piezoelectric particles may be dispersed in the polymer material and remain substantially non-agglomerated when combined with the polymer material. The polymer material may comprise at least one thermoplastic polymer, optionally further including a polymer precursor. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste.
    Type: Application
    Filed: March 22, 2022
    Publication date: May 18, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Publication number: 20230135112
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles and a polymer material comprising at least one thermoplastic polymer and at least one photocurable polymer precursor. The at least one photocurable polymer precursor may undergo a reaction in the presence of electromagnetic radiation, optionally undergoing a reaction with the piezoelectric particles, in the course of forming the printed part. The piezoelectric particles may be mixed with the polymer material and remain substantially non-agglomerated when combined with the polymer material.
    Type: Application
    Filed: March 22, 2022
    Publication date: May 4, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET
  • Publication number: 20230122929
    Abstract: Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles located in a polymer matrix comprising a first polymer material and a sacrificial material that are immiscible with each other. The sacrificial material, which may comprise a second polymer material, may be removable from the first polymer material under specified conditions. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The polymer matrix may be treated to remove the sacrificial material to introduce a plurality of pores. The compositions may have a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste.
    Type: Application
    Filed: March 22, 2022
    Publication date: April 20, 2023
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Sarah J. VELLA, Alexandros VASILEIOU, Yujie ZHU, Edward G. ZWARTZ, Chantal PAQUET, Silvio E. KRUGER, Mohammad RAFIEE, Yujie ZHANG, Thomas LACELLE, Derek ARANGUREN VAN EGMOND, Claudie ROY
  • Patent number: 11597805
    Abstract: A method for producing polysulfone micro-particles for 3D printing disclosed. For example, the method includes creating a mixture of polysulfone by dissolving polysulfone in an organic solvent, creating an aqueous solution of a polymeric stabilizer or a surfactant, adding the mixture of polysulfone to the aqueous solution to create a polysulfone solution, and processing the polysulfone solution to obtain polysulfone micro-particles having a desired particle size, a desired particle size distribution, and a desired shape.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: March 7, 2023
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Edward G. Zwartz, Sandra J. Gardner