Patents by Inventor David Mathews

David Mathews 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: 20250100223
    Abstract: A method of additive manufacturing includes i) forming a first layer, the including a material chosen from an article material, a support structure material and an interfacial material. The method includes ii) forming an additional layer on the first layer, including at least one material chosen from the article material, the support structure material and the interfacial material. The method also includes iii) repeating ii) one or more times to form a three-dimensional build may include an article and at least one support structure attached to the article at an interface, the interface may include the interfacial material formed during one or more of i), ii) or iii), the interfacial material may include a polymer. An additive manufacturing system includes a controller operatively connected to a reservoir, an ejector, and an actuator, the controller being configured to perform the method and form a printed article.
    Type: Application
    Filed: September 21, 2023
    Publication date: March 27, 2025
    Applicant: XEROX CORPORATION
    Inventors: Junhua Wei, Gregory Brian Anderson, Daniel Bullard, David Mathew Johnson
  • Publication number: 20250100222
    Abstract: A system and method of additive manufacturing includes i) forming a first layer, the first layer may include at least one material chosen from an article material, a support structure material and an interfacial material. The method also includes ii) forming an additional layer on the first layer, the additional layer may include at least one material chosen from the article material, the support structure material and the interfacial material. The method also includes iii) repeating ii) one or more times to form a three-dimensional build may include an article and at least one support structure attached to the article at an interface, the interface may include the interfacial material formed during one or more of i), ii) or iii), and the interfacial material may include a preceramic. An interfacial material may include a preceramic or further include carbon, aluminum oxide, or silicon carbide.
    Type: Application
    Filed: September 21, 2023
    Publication date: March 27, 2025
    Applicant: XEROX CORPORATION
    Inventors: Junhua Wei, Gregory Brian Anderson, Daniel Bullard, David Mathew Johnson
  • Publication number: 20250065462
    Abstract: A system includes a closed loop configured to flow a heat transfer fluid to regulate temperature of a process tool. The heat transfer fluid includes a flammable or combustible fluid. The system further includes a temperature control unit configured to receive the heat transfer fluid and regulate temperature of the heat transfer fluid. The system further includes a plurality of sensor configured to measure one or more properties of the heat transfer fluid. The system further includes a controller configured to determine a fault in the closed loop based on sensor data received from the plurality of sensors and to further cause a corrective action responsive to determining the fault.
    Type: Application
    Filed: February 2, 2024
    Publication date: February 27, 2025
    Inventors: Rony David Mathew, Varun Kumar Chenna
  • Patent number: 12202001
    Abstract: An aerosol creation system includes a pair of counter-rotating rollers, a nip between the two rollers, the nip having an upstream side and a downstream side, and a pool of fluid on the upstream side of the nip, the fluid being drawn into the nip through the motion of the rollers, such that on the downstream side the fluid stretches between diverging surfaces of the two rollers and forms filaments that breaks up into droplets. A multi-roller aerosol creation system includes more than two rollers arranged to touch each other in a configuration, wherein areas where the rollers touch form nips, each nip having an upstream side and a downstream side, wherein the downstream side of the nips are positioned within a central space within the configuration of the rollers, and fluid surrounding the circular configuration, wherein an outer region of the circular configuration forms the upstream side of the nips.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: January 21, 2025
    Assignee: Xerox Corporation
    Inventors: David Mathew Johnson, Victor Beck
  • Publication number: 20250018653
    Abstract: An apparatus and method are provided for extracting a build part from an additive manufacturing machine. Upon completion of the build part by the additive manufacturing machine, a pin array is placed above the build part, the pin array including a plurality of pins slidably supported by a support plate for vertical movement relative to the support plate. The pin array is moved toward the build part so that the plurality of pins contact the build part and conform to the contour of the build part. The pins of the pin array are locked with the pins in contact with and conforming to the build part. The pin array and build part are inverted so that the build part is supported by the locked pins of the pin array. All of the pins of the array are locked simultaneously by a common locking component. The build plate can be formed on a sacrificial interposer plate that is removed by an etchant bath supported on the pin array when the build part is inverted.
    Type: Application
    Filed: October 2, 2024
    Publication date: January 16, 2025
    Inventors: David K. Biegelsen, David Mathew Johnson
  • Patent number: 12157273
    Abstract: An apparatus and method are provided for extracting a build part from an additive manufacturing machine. Upon completion of the build part by the additive manufacturing machine, a pin array is placed above the build part, the pin array including a plurality of pins slidably supported by a support plate for vertical movement relative to the support plate. The pin array is moved toward the build part so that the plurality of pins contact the build part and conform to the contour of the build part. The pins of the pin array are locked with the pins in contact with and conforming to the build part. The pin array and build part are inverted so that the build part is supported by the locked pins of the pin array. All of the pins of the array are locked simultaneously by a common locking component. The build plate can be formed on a sacrificial interposer plate that is removed by an etchant bath supported on the pin array when the build part is inverted.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: December 3, 2024
    Assignee: Xerox Corporation
    Inventors: David K. Biegelsen, David Mathew Johnson
  • Publication number: 20240068093
    Abstract: A system and method for controlling pressure in a foreline of a processing system are disclosed herein that reduce variation in foreline pressure. In one example, a processing system is provided that includes a first process chamber, a first pump, a foreline, and a first foreline pressure control system. The first pump has an inlet and an outlet. The inlet of the first pump coupled to an exhaust port of the first process chamber. The foreline is coupled to the outlet of the first pump. The first foreline pressure control system is fluidly coupled to the foreline downstream of the first pump. The first foreline pressure control system is operable to control a pressure in the foreline independent from operation of the first pump.
    Type: Application
    Filed: August 25, 2022
    Publication date: February 29, 2024
    Inventors: Ryan T. DOWNEY, James L'HEUREUX, Rony David MATHEW
  • Patent number: 11912013
    Abstract: Ink-based digital printing systems useful for ink printing include a rotatable charge-retentive reimageable surface layer configured to receive a layer of fountain solution. The fountain solution is carried to the charge retentive surface by a fog or mist including fountain solution aerosol particles, dispersed gas particles, and charge directors that impart charge to the fountain solution aerosol particles. The charge-retentive reimageable surface may be charged to a uniform potential, and selectively discharged using an ROS according to image data to form an electrostatic latent image. The charged fountain solution adheres to portions of the charge-retentive reimageable surface according to the electrostatic latent image to form a fountain solution image thereon. The fountain solution image can be partially transferred to an imaging blanket, where the fountain solution image is inked. The resulting ink image may be transferred to a print substrate.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: February 27, 2024
    Assignee: Xerox Corporation
    Inventors: Kathryn F. Murphy, Thomas Wunderer, Anne Plochowietz, David K. Biegelsen, Joerg Martini, David Mathew Johnson, Palghat S. Ramesh
  • Patent number: 11905387
    Abstract: A method of producing functionalized graphene oxide includes mixing graphene oxide with a reactive monomer containing at least one epoxy functional group and a secondary functional group that is selected from vinyl, acrylate, methacrylate, and epoxy to form a mixture, adding an activation agent, heating and stirring the mixture, cooling the mixture, separating the particles from the mixture, and drying the particles to produce functionalized graphene oxide.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: February 20, 2024
    Assignee: XEROX CORPORATION
    Inventors: Junhua Wei, Gabriel Iftime, David Mathew Johnson, Jessica Louis Baker Rivest
  • Patent number: 11904277
    Abstract: A method of dispensing a graded material includes generating droplets of a first working material, the droplets having a size in the range of 10 nanometers to 10 micrometers, adding the droplets of the first working material into a carrier fluid to create a first emulsion, wherein addition of the droplets of the first working material is controlled to create gradient in the emulsion, mixing the first emulsion to create a homogenous, graded mixture, and dispensing the homogenous, graded mixture onto a surface.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: February 20, 2024
    Assignee: XEROX CORPORATION
    Inventors: John Steven Paschkewitz, David Mathew Johnson
  • Publication number: 20240050666
    Abstract: Mass vaccination of one or more animals may be performed topically using viscosified fluids and a spray delivery device. When applied to one or more animals, the viscosified fluids may adhere a medicament upon a topical surface of the one or more animals. The spray delivery device may comprise at least a spray component, a fluid reservoir component, a plunger, an electronics component, and a battery.
    Type: Application
    Filed: August 11, 2022
    Publication date: February 15, 2024
    Applicant: Palo Alto Research Center Incorporated
    Inventors: Jerome UNIDAD, David Mathew JOHNSON, Graham ALDINGER, Kevin PINTONG
  • Patent number: 11834592
    Abstract: A deposition system has a multi-material print head, a first reservoir of a first compatible material having particles containing chemical elements similar to a first substrate, a second reservoir of a second compatible material having particles containing chemical elements similar to a second substrate, a third reservoir of an polymer precursor material, and at least one mixer. A method of bonding a joint between dissimilar substrate materials includes functionalizing a first compatible material having chemical elements similar to a first substrate, mixing the first compatible material with a polymer precursor material, functionalizing a second compatible material having chemical elements similar to a second substrate, mixing the second compatible material with a polymer precursor material, and using the deposition system to deposit the first and second compatible materials and a polymer precursor material on the joint between the first and second substrate materials.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: December 5, 2023
    Assignee: XEROX CORPORATION
    Inventors: Gabriel Iftime, David Mathew Johnson, Jessica Louis Baker Rivest
  • Patent number: 11826695
    Abstract: A gas separation system has system input inlet configured to receive a stream mixture including a target gas, one or more spray generators positioned to spray a non-sprayable liquid to change a concentration of the target gas in the non-sprayable liquid, one or more system outlets positioned to outlet an output material, wherein at least one of the system outlets outputs a material having a lower amount of the target gas than the input stream mixture, and a recirculating path connected to the one or more outputs and the input inlet to allow recirculation of the non-sprayable liquid. A method of performing gas separation includes absorbing a target gas from an input stream in a non-sprayable capture liquid, and releasing the target gas in an output gas stream by spraying the non-sprayable capture liquid into a heated volume using a spray generator.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: November 28, 2023
    Assignee: XEROX CORPORATION
    Inventors: Mahati Chintapalli, Jerome Unidad, Kathryn F. Murphy, Ravi Neelakantan, Rahul Pandey, Stephen Matthew Meckler, David Mathew Johnson
  • Patent number: 11787987
    Abstract: A pair of bonded substrates having a first substrate of a first material, a second substrate of the first material, and an adhesive bonding the first substrate to the second substrate, wherein the adhesive has chemically linked compatibilizing particles compatible with the first and second substrates. A composition of matter has an adhesive having a chemically linked particle network forming a bond between a first substrate and a second substrate, wherein compatibilizing particles in the particle network are compatible with the first and second substrates. A method of joining two structures of identical materials includes preparing first and second structures to expose bare material, applying an adhesive to the bare material on the first and second structures, the adhesive containing compatibilizing particles compatible with the material and the preparing allows interaction between the material and the compatibilizing particles, and curing the adhesive.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: October 17, 2023
    Assignee: XEROX CORPORATION
    Inventors: Gabriel Iftime, Jessica Louis Baker Rivest, David Mathew Johnson, Junhua Wei, Eugene Shin Ming Beh
  • Patent number: 11738393
    Abstract: A build plate for an additive manufacturing device and methods for the same are provided. The build plate may include a base and a sacrificial plate coupled with the base. The etch rate of the sacrificial plate in an etchant may be greater than an etch rate of the base in the etchant. A method for separating a 3D printed article supported on the build plate may include contacting the sacrificial plate with the etchant.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: August 29, 2023
    Assignee: XEROX CORPORATION
    Inventors: David K. Biegelsen, Scott E. Solberg, David Mathew Johnson
  • Patent number: 11732378
    Abstract: A system to electrohydrodynamically pattern a material includes a first electrode having a first voltage, a second electrode having a second voltage that is different from the first voltage, one or more materials to be patterned residing between the first electrode and the second electrode, a gap between at least one surface of at least one of the materials to be patterned and one of the first or second electrodes, at least one patterning material in the gap, wherein the patterning material is a material other than air, and at least one filling material filling any remainder of the gap.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: August 22, 2023
    Inventors: Michael Benedict, David Mathew Johnson, Elif Karatay, Eric Weflen, Ravi Neelakantan
  • Publication number: 20230234290
    Abstract: An apparatus and method are provided for extracting a build part from an additive manufacturing machine. Upon completion of the build part by the additive manufacturing machine, a pin array is placed above the build part, the pin array including a plurality of pins slidably supported by a support plate for vertical movement relative to the support plate. The pin array is moved toward the build part so that the plurality of pins contact the build part and conform to the contour of the build part. The pins of the pin array are locked with the pins in contact with and conforming to the build part. The pin array and build part are inverted so that the build part is supported by the locked pins of the pin array. All of the pins of the array are locked simultaneously by a common locking component. The build plate can be formed on a sacrificial interposer plate that is removed by an etchant bath supported on the pin array when the build part is inverted.
    Type: Application
    Filed: January 27, 2022
    Publication date: July 27, 2023
    Inventors: David K. Biegelsen, David Mathew Johnson
  • Publication number: 20230234083
    Abstract: An apparatus includes a first belt having an external surface, a second belt having an external surface positioned with the external surface opposite to the external surface of the first belt, with a region in which the first belt and the second belt come in contact, a first set of guide devices arranged inside the first belt, a second set of guide devices inside the second belt, a first material dispenser positioned to allow a first material to be dispensed on the external surface at least one of the first and second belts, a second material dispenser positioned to allow a second material to be dispensed on the external surface at least one of the first and second belts, and a power source to cause at least one of the guide devices in at least one of the first set and the second set of guide devices to cause at least one of the first and second belts to move to cause the external surfaces of the first and second belts contact and then diverge away from each other so that at least one of the first material an
    Type: Application
    Filed: January 27, 2022
    Publication date: July 27, 2023
    Inventors: RAVI NEELAKANTAN, JAMIE KALB, DAVID MATHEW JOHNSON, JOERG MARTINI
  • Publication number: 20230130161
    Abstract: A gas separation system has system input inlet configured to receive a stream mixture including a target gas, one or more spray generators positioned to spray a non-sprayable liquid to change a concentration of the target gas in the non-sprayable liquid, one or more system outlets positioned to outlet an output material, wherein at least one of the system outlets outputs a material having a lower amount of the target gas than the input stream mixture, and a recirculating path connected to the one or more outputs and the input inlet to allow recirculation of the non-sprayable liquid. A method of performing gas separation includes absorbing a target gas from an input stream in a non-sprayable capture liquid, and releasing the target gas in an output gas stream by spraying the non-sprayable capture liquid into a heated volume using a spray generator.
    Type: Application
    Filed: October 25, 2021
    Publication date: April 27, 2023
    Inventors: Mahati Chintapalli, Jerome Unidad, Kathryn F. Murphy, Ravi Neelakantan, Rahul Pandey, Stephen Matthew Meckler, David Mathew Johnson
  • Patent number: 11547447
    Abstract: Devices, systems, and methods for delivering fluid are provided. Devices include a housing configured for intravaginal deployment and retention, at least one reservoir configured to contain a fluid, and a fluid dispensing mechanism configured to dispense the fluid past the cervix and to the uterus of the subject. Methods include intravaginally deploying and retaining a device in the subject, and dispensing the fluid from the device such that the fluid is driven past the cervix to the uterus of the subject.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: January 10, 2023
    Assignee: Palo Alto Research Center Incorporated
    Inventors: David Mathew Johnson, Scott A. Uhland, Robert Thomas Krivacic, Ramkumar Abhishek, Martin Sheridan