Patents by Inventor Ernest Walker

Ernest Walker 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: 11535161
    Abstract: The deployable steps for a tailgate includes a mounting plate, a plurality of risers, a plurality of treads, and a plurality of hinges. The deployable steps for a tailgate may attach to a tailgate of a truck via the mounting plate. The plurality of risers and the plurality of treads may fold and unfold at the plurality of hinges. The plurality of risers and the plurality of treads may form steps when unfolded into a deployed position. When folded into a stowed position, the plurality of risers and the plurality of treads may be parallel to each other and may be parallel to the tailgate.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: December 27, 2022
    Inventor: Ernest Walker
  • Publication number: 20190175591
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Application
    Filed: February 20, 2019
    Publication date: June 13, 2019
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Patent number: 10251881
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: April 9, 2019
    Assignee: Nektar Therapeutics
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Publication number: 20170173006
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Application
    Filed: March 2, 2017
    Publication date: June 22, 2017
    Inventors: Andreas KORDIKOWSKI, Stephen Ernest WALKER, Peter YORK
  • Patent number: 9616060
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogs thereof, or derivatives thereof.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: April 11, 2017
    Assignee: Nektar Therapeutics
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Publication number: 20140342002
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 20, 2014
    Inventors: Andreas KORDIKOWSKI, Stephen Ernest WALKER, Peter YORK
  • Patent number: 8828359
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogs thereof, or derivatives thereof.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: September 9, 2014
    Assignee: Nektar Therapeutics
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Publication number: 20140037697
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Application
    Filed: June 3, 2013
    Publication date: February 6, 2014
    Applicant: NEKTAR THERAPEUTICS
    Inventors: Andreas KORDIKOWSKI, Stephen Ernest WALKER, Peter YORK
  • Patent number: 8470301
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: June 25, 2013
    Assignee: Nektar Therapeutics
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Publication number: 20120058160
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing such particles or formulations. In one embodiment, a composition of an aerosol formulation is provided and contains a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m suspended in a hydrofluorocarbon fluid vehicle at a concentration within a range from about 0.2% w/v to about 5% w/v. The aerosol formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the hydrofluorocarbon fluid vehicle. The particulate active substance contains an alkaloid ergotamine, pharmaceutically acceptable salts thereof, analogues thereof, or derivatives thereof.
    Type: Application
    Filed: November 11, 2011
    Publication date: March 8, 2012
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Patent number: 8080236
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing the particles or formulations. In one embodiment, an inhaler contains an aerosol formulation containing a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m. The particles may be suspended in a nonsolvent hydrofluorocarbon fluid vehicle (e.g., HFA 134a or 227ea) at a concentration within a range from about 0.2% w/v to about 5% w/v. The formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the vehicle. The particulate active substance may contain salmeterol xinafoate, budesonide, salbutamol sulfate, dihydroergotamine mesylate, risperidone-(9-hydroxy)-palmitate, bromocriptine mesylate, or derivatives thereof. In some examples, the active substance is dihydroergotamine mesylate.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: December 20, 2011
    Assignee: Nektar Therapeutics UK, Ltd
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Publication number: 20100043717
    Abstract: A litter containment and disposal apparatus is provided, the apparatus comprising: an open top rectangular portion having a bottom with at least one cutout opening therein and at least three sides; a drawer in communication with a portion of the bottom, wherein the drawer is directly below and slightly larger than the at least one cutout opening; and a container comprising a support portion and a liquid impervious shell which may contain absorbent material attached to the support portion, wherein the support portion is smaller than the drawer and adapted to fit inside the drawer and liquid impervious shell containing absorbent material hangs from the support portion below the drawer.
    Type: Application
    Filed: July 27, 2009
    Publication date: February 25, 2010
    Inventor: Ernest Walker
  • Publication number: 20090291050
    Abstract: Embodiments of the invention relate to particles of active substances, methods for preparing the particles, formulations containing the particles, and metered dose inhalers containing the particles or formulations. In one embodiment, an inhaler contains an aerosol formulation containing a particulate active substance of non-micronized, solid particles having a mass median aerodynamic diameter of less than 10 ?m. The particles may be suspended in a nonsolvent hydrofluorocarbon fluid vehicle (e.g., HFA 134a or 227ea) at a concentration within a range from about 0.2% w/v to about 5% w/v. The formulation exhibits a flocculation volume of about 85% or greater about 1 minute after mixing the particulate active substance and the vehicle. The particulate active substance may contain salmeterol xinafoate, budesonide, salbutamol sulfate, dihydroergotamine mesylate, risperidone-(9-hydroxy)-palmitate, bromocriptine mesylate, or derivatives thereof. In some examples, the active substance is dihydroergotamine mesylate.
    Type: Application
    Filed: June 12, 2009
    Publication date: November 26, 2009
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Patent number: 7582284
    Abstract: The present invention relates to active substances in particulate form, to methods for preparing them, to formulations containing them and to uses of such substances and formulations. A preferred embodiment is directed to particulate suspensions having improved flocculation behavior in a suspension vehicle, such as a hydrofluoroalkane propellant used in metered dose inhalers.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: September 1, 2009
    Assignee: Nektar Therapeutics
    Inventors: Andreas Kordikowski, Stephen Ernest Walker, Peter York
  • Patent number: 7403030
    Abstract: An apparatus for providing current to a device under test includes a first parametric measurement unit configured to provide current to the device, and a second parametric measurement unit configured to provide current to the device. The current from the second parametric measurement unit augments the current from the first parametric measurement unit at the device.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: July 22, 2008
    Assignee: Teradyne, Inc.
    Inventors: Ernest Walker, Ron Sartschev
  • Publication number: 20070283896
    Abstract: A litter containment and disposal apparatus, the apparatus comprising: an open top rectangular portion having a bottom with at least one cutout opening therein and at least three sides; a base portion in communication with the bottom having a drawer, wherein the drawer is directly below and slightly larger than the at least one cutout opening; and an absorbent bag container, wherein the absorbent bag container is smaller than the drawer and adapted to fit inside the drawer and the absorbent bag container contains an absorbent material
    Type: Application
    Filed: March 27, 2007
    Publication date: December 13, 2007
    Inventor: Ernest Walker
  • Patent number: 7271610
    Abstract: Circuitry for use in testing a device includes a first measurement unit to apply a forced voltage to the device, and a second measurement unit having functionality that is disabled. The second measurement unit includes a sense path to receive a sensed voltage from the device, where the sense path connects to the first measurement unit through the second measurement unit. The first measurement unit adjusts the forced voltage based on the sensed voltage.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: September 18, 2007
    Assignee: Teradyne, Inc.
    Inventors: Ernest Walker, Ron Sartschev
  • Patent number: 7256600
    Abstract: A semiconductor device tester includes a parametric measurement unit (PMU) stage for producing a DC test signal and a pin electronics (PE) stage for producing an AC test signal to test a semiconductor device. A driver circuit is capable of providing a version of the DC test signal and a version of the AC test signal to the semiconductor device.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: August 14, 2007
    Assignee: Teradyne, Inc.
    Inventors: Ernest Walker, Ronald A. Sartschev
  • Publication number: 20070126487
    Abstract: A method and apparatus is provided to recover clock information embedded in a digital signal such as a data signal. A set of strobe pulses can be generated by routing an edge generator to a delay elements with incrementally increasing delay values. A set of latches triggered by incrementally delayed signals from the edge generator can capture samples of the data signal. An encoder can convert the samples to a word representing edge time and polarity of the sampled signal. The word representing edge time can be stored in memory. An accumulator can collect the average edge time over N samples. The average edge time can be adjusted with a fixed de-skew value to form the extracted clock information. The extracted clock information can be used as a pointer to the words stored in memory.
    Type: Application
    Filed: September 23, 2005
    Publication date: June 7, 2007
    Inventors: Ronald Sartschev, Ernest Walker
  • Publication number: 20070091991
    Abstract: A test system timing method simulates the timing of a synchronous clock on the device under test. Strobe pulses can be generated by routing an edge generator to delay elements with incrementally increasing delay values. A data signal or synchronous clock signal can be applied to the input of each of a set of latches which are clocked by the strobe pulses. An encoder can convert the series of samples which are thereby latched to a word representing edge time and polarity of the sampled signal. If the sampled signal is a data signal, the word can be stored in memory. If the sampled signal is a clock signal, the word is routed to a clock bus and used to address the memory. The difference between clock edge time and data edge time is provided and can be compared against expected values.
    Type: Application
    Filed: September 23, 2005
    Publication date: April 26, 2007
    Inventors: Ronald Sartschev, Ernest Walker