Patents by Inventor David Mathew

David Mathew 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: 20210040646
    Abstract: A method includes applying pressure to a liquid feed of nanofiber material at a first nozzle of an array of nozzles having a first electrode voltage applied to a first electrode within an array of nozzles to form a first enlarged meniscus having a nanofiber attached, applying pressure to the liquid feed at a second nozzle having a second electrode voltage applied to a second electrode and adjacent the first nozzle within the array to form a second enlarged meniscus, increasing the second electrode voltage applied to the second electrode to a voltage level equal to voltage applied to the first electrode when the first and second enlarged menisci meet and form a combined meniscus with the nanofiber attached, decreasing the first electrode voltage to zero, and decreasing pressure on the liquid feed at the first nozzle to separate the first enlarged meniscus at the first nozzle from the second enlarged meniscus at the second nozzle having the nanofiber attached.
    Type: Application
    Filed: October 27, 2020
    Publication date: February 11, 2021
    Inventor: DAVID MATHEW JOHNSON
  • Patent number: 10898914
    Abstract: A method of creating aerosols includes drawing a fluid from a fluid source through a first nip, the first nip defined between a first roller and an inner surface of a ring, the first nip having an upstream side and a downstream side, drawing the fluid from the fluid source through a second nip, the second nip defined between a second roller and the inner surface of the ring, the second roller positioned adjacent to and spaced apart from the first roller in a circular configuration, the second nip having an upstream side and a downstream side, stretching the fluid between diverging surfaces of the first roller and the inner surface of the ring on the downstream side of the first nip to form a first fluid filament, stretching the fluid between diverging surface of the second roller and the inner surface of the ring on the downstream side of the second nip to form a second fluid filament, causing the first fluid filament to break into a plurality of first droplets, and causing the second fluid filament to break
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: January 26, 2021
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: David Mathew Johnson, Victor Beck
  • Patent number: 10882972
    Abstract: A method of manufacturing a cured polymer resin using functionalized graphene oxide, includes mixing functionalized graphene oxide with a resin precursor and an optional solvent to produce a functionalized graphene solution wherein the particles contain functional groups nearly identical to, or identical to, a polymer precursor material, adding a curing initiator to the resin solution and mixing to produce a resin solution, depositing the formulation into a desired shape, and curing the formulation to form a polymer having functionalized graphene oxide groups in a base polymer material.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: January 5, 2021
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: Junhua Wei, Gabriel Iftime, David Mathew Johnson, Jessica Louis Baker Rivest
  • Patent number: 10870927
    Abstract: An electrospinning system for weaving nanofibers may include a digital array of addressable nozzles electrowetted with a liquid nanofiber source material. Each nozzle in the array may include an individually controllable actuator and electrode for modulating the flowrate and charge of the liquid nanofiber source material. Through selectively applying pressure and voltage to individual nozzles, the location of the nanofiber relative to the array may be controlled through digital signals alone, without having to physically move any component of the electrospinning system. By simultaneously controlling the path of multiple nanofibers within the array, new and complex weaving patterns for braids may be achieved with enhanced strength and other properties at a scale previously unattainable.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: December 22, 2020
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventor: David Mathew Johnson
  • Patent number: 10850236
    Abstract: A mixing system has a parallel droplet dispenser capable of making droplets of a first working material in the range of 10 nanometers to 10 micrometers, a pump to deliver fluid for the droplets of the first working material and to produce a first emulsion, a compact mixer having low inter-voxel mixing to receive the emulsion and produce a homogenous material, and a dispensing system. 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 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: August 31, 2015
    Date of Patent: December 1, 2020
    Assignee: Palo Alto Research Center Incorporated
    Inventors: John Steven Paschkewitz, David Mathew Johnson
  • Publication number: 20200353743
    Abstract: Ink-based digital printing systems useful for ink printing include a photoreceptor layer configured to receive a layer of liquid immersion fluid. The liquid immersion fluid includes dampening fluid, dispersed gas particles, and charge directors that impart charge to the solid particles. The photoreceptor surface is charged to a uniform potential, and selectively discharged using an ROS according to image data to form an electrostatic latent image. The charged liquid immersion fluid adheres to portions of the photoreceptor surface according to the electrostatic latent image to form a fountain solution image. The fluid portion of the fountain solution image can be partially transferred to an imaging member and/or transfer member to form a dampening fluid image, either or both of which may be electrically biased. The dampening fluid image is inked on the transfer member, and the resulting ink image transferred to a print substrate.
    Type: Application
    Filed: July 29, 2020
    Publication date: November 12, 2020
    Inventors: Antonio St. Clair Lloyd WILLIAMS, David K. BIEGELSEN, David Mathew JOHNSON
  • Patent number: 10794858
    Abstract: An electrochemical metal alloy identification device employing electrolytes to measure and identify different potentials of alloys is presented. This includes physical structure, disposables, electrical systems, control circuitry, and algorithms to identify alloys.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: October 6, 2020
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: David Mathew Johnson, Jianer Bao, Martin J. Sheridan, Vedasri Vedharathinam, Christopher Paulson, Bhaskar Saha, Jessica Louis Baker Rivest
  • Publication number: 20200308041
    Abstract: An apparatus comprises a stressed glass member and an actuator mounted on the stressed glass member. A power source is coupled to the actuator. An abrasion structure is disposed between the actuator and the stressed glass member. The abrasion structure comprises abrading features in contact with the stressed glass member. The abrading features have a hardness higher than a hardness of the stressed glass member. When energized by the power source, the actuator is configured to induce movement of the abrasion structure that causes the abrading features to create scratches in the stressed glass member to a depth sufficient to initiate fracture of the stressed glass member.
    Type: Application
    Filed: June 16, 2020
    Publication date: October 1, 2020
    Inventors: Kathryn Murphy, Scott J. Limb, David Mathew Johnson
  • Patent number: 10744754
    Abstract: Ink-based digital printing systems useful for ink printing include a photoreceptor layer configured to receive a layer of liquid immersion fluid. The liquid immersion fluid includes dampening fluid, dispersed gas particles, and charge directors that impart charge to the solid particles. The photoreceptor surface is charged to a uniform potential, and selectively discharged using an ROS according to image data to form an electrostatic latent image. The charged liquid immersion fluid adheres to portions of the photoreceptor surface according to the electrostatic latent image to form a fountain solution image. The fluid portion of the fountain solution image can be partially transferred to an imaging member and/or transfer member to form a dampening fluid image, either or both of which may be electrically biased. The dampening fluid image is inked on the transfer member, and the resulting ink image transferred to a print substrate.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: August 18, 2020
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Antonio St. Clair Lloyd Williams, David K. Biegelsen, David Mathew Johnson
  • Patent number: 10744686
    Abstract: A system and method is provided for creating a structure including a vasculature network. A film deposition device is configured to dispense droplets onto a surface of a substrate to form a curable fugitive pre-patterned liquid film on the surface of the substrate. An electrohydrodynamic film patterning (EHD-FP) device has a patterned electrode structure formed to generate an electric field and to subject the film on the surface of the substrate to the electric field. The film thereby being formed by the EHD-FP into patterned features in response to being subjected to the electric field. Then a casting system is configured to cover the patterned features in an epoxy to form patterned structures, wherein the patterned structures comprise a fugitive vasculature structure.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: August 18, 2020
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: David Mathew Johnson, Corie Lynn Cobb, John Steven Paschkewitz
  • Publication number: 20200236976
    Abstract: Co-products from juice extraction, in particular for use in beverage and food products to enhance nutrition and sensory attributes of the products, are provided. The co-product has a number average particle size of between 1 and 2000 microns, a total polyphenol content of at least 2500 parts per million, a moisture content of between 70% and 85% by weight, and a combined peel and seed content between 0.01% and 20% by weight.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 30, 2020
    Inventors: Sundar Bala, Bryan William Hitchcock, MongJan Hsieh, Rachel Lisa Jordan, Jeffrey David Mathews, Teodoro Rivera, Jin-E Shin, William B. Small, II
  • Patent number: 10717271
    Abstract: An apparatus for non-evaporative drying comprises a solvent permeable transfer substrate having a first surface and a second surface opposite the first surface. An ejector is configured to eject a droplet comprising at least one solvent onto the first surface of the transfer substrate. A reservoir comprising a draw solution is configured to place the draw solution in contact with the second surface of the transfer substrate, and a print substrate is configured to contact a portion of the first surface of the transfer substrate.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: July 21, 2020
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Eugene S. Beh, Michael Benedict, Jessica Louis Baker Rivest, David Mathew Johnson
  • Patent number: 10717669
    Abstract: An apparatus comprises a stressed glass member and an actuator mounted on the stressed glass member. A power source is coupled to the actuator. An abrasion structure is disposed between the actuator and the stressed glass member. The abrasion structure comprises abrading features in contact with the stressed glass member. The abrading features have a hardness higher than a hardness of the stressed glass member. When energized by the power source, the actuator is configured to induce movement of the abrasion structure that causes the abrading features to create scratches in the stressed glass member to a depth sufficient to initiate fracture of the stressed glass member.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: July 21, 2020
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Kathryn Murphy, Scott J. Limb, David Mathew Johnson
  • Publication number: 20200207074
    Abstract: An apparatus for non-evaporative drying comprises a solvent permeable transfer substrate having a first surface and a second surface opposite the first surface. An ejector is configured to eject a droplet comprising at least one solvent onto the first surface of the transfer substrate. A reservoir comprising a draw solution is configured to place the draw solution in contact with the second surface of the transfer substrate, and a print substrate is configured to contact a portion of the first surface of the transfer substrate.
    Type: Application
    Filed: December 31, 2018
    Publication date: July 2, 2020
    Inventors: Eugene S. Beh, Michael Benedict, Jessica Louis Baker Rivest, David Mathew Johnson
  • Publication number: 20200201812
    Abstract: A method of storing digital data in non-biological sequence-controlled polymers includes converting a digital data file into a monomer sequence, synthesizing polymer chains according to the monomer sequence, and encapsulating the polymer chains into microfluidic droplets and providing the microfluidic droplets with addresses. A polymer data storage system has a first converter to convert digital data to a polymer sequence, a polymer synthesizer to produce polymer chains according to a pre-determined monomer sequence, a fluidic encapsulation system to encapsulate the polymer chains in microfluidic droplets and to apply addressing materials to the microfluidic droplets, a storage for storing the microfluidic droplets, a droplet sorting system having at least an actuator to sort the droplets, a sequencer to derive the polymer sequence from the polymer chains contained in the droplets, and a second converter to convert the polymer sequence to digital data.
    Type: Application
    Filed: December 21, 2018
    Publication date: June 25, 2020
    Inventors: JEROME UNIDAD, DAVID MATHEW JOHNSON, ELIF KARATAY, MAHATI CHINTAPALLI
  • Publication number: 20200170265
    Abstract: Edible tubular casings for meats, such as sausages are described. The casings are comprised of reconstituted collagen combined with natural casing material comprising bovine, porcine or sheep gut, or combinations thereof. Methods for producing the casings by forming a gel consisting of a combination of the natural material and the reconstituted collagen are also described.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 4, 2020
    Inventors: Eugene Goldfarb, Masayuki Mimasu, David Mathews
  • Patent number: 10667546
    Abstract: Co-products from juice extraction, in particular for use in beverage and food products to enhance nutrition and sensory attributes of the products, are provided. The co-product has a number average particle size of between 1 and 2000 microns, a total polyphenol content of at least 2500 parts per million, a moisture content of between 70% and 85% by weight, and a combined peel and seed content between 0.01% and 20% by weight.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: June 2, 2020
    Assignee: PepsiCo, Inc.
    Inventors: Sundar Bala, Bryan William Hitchcock, MongJan Hsieh, Rachel Lisa Jordan, Jeffrey David Mathews, Teodoro Rivera, Jin-E Shin, William B. Small, II
  • Publication number: 20200093998
    Abstract: A hand-held dispenser to dispense fluid includes a casing to fit into a hand of a user, a nozzle in the casing to dispense a mist, a fluid reservoir contained in the casing to hold a fluid to be turned into the mist, a filament extension atomizer contained in the casing to generate the mist, an air source contained in the casing to provide air flow to direct the mist to the nozzle, a motor contained in the casing to operate the filament extension atomizer, an actuator positioned on the casing to activate the dispenser, a control circuit contained in the casing to receive a signal from the actuator and to send a signal to the motor to cause the motor to actuate, and a power source contained in the casing to provide power to the motor upon receive a signal from the control circuit.
    Type: Application
    Filed: September 25, 2018
    Publication date: March 26, 2020
    Inventors: MICHAEL BENEDICT, DAVID MATHEW JOHNSON, SCOTT E. SOLBERG, JAMIE KALB, RAVI NEELAKANTAN, JEROME UNIDAD, DAVID CHARLES TAYLOR, FRANCES YAN
  • Patent number: 10596358
    Abstract: Retention devices and methods are provided for drug delivery. The device may include a housing configured for intraluminal deployment into a human or animal subject and at least one reservoir contained within the housing. The at least one reservoir may have an actuation end and a release end and contain at least one drug formulation. A plug may be contained within the at least one reservoir and be moveable from the actuation end toward the release end. The device may also include an actuation system operably connected to the actuation end of the at least one reservoir and configured to drive the at least one drug formulation from the reservoir. The device may also include at least one retention member affixed to the housing and movable between a non-stressed position, a deployment position, and a retention position for retaining the device in an intraluminal location in the subject.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: March 24, 2020
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: David Mathew Johnson, Martin Sheridan, Scott A. Uhland, Ramkumar Abhishek, Eric Peeters, Timothy J. Curley, Felicia Linn, Philipp H. Schmaelzle
  • Patent number: D892082
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: August 4, 2020
    Assignee: AUDIO PRECISION, INC.
    Inventor: David Mathew