Patents by Inventor John Macphail

John Macphail 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).

  • Method for zonal injection of chemicals into a furnace convective pass to reduce pollutants from flue gases
    Patent number: 7622093
    Abstract: Zonal injection of varying compositions of chemicals, particularly an ammonia-based reagent and hydrocarbon, through injection lances arranged in a grid formation to define planar zones in a furnace convective pass of a furnace. The supply of chemicals is controlled so as to be individually determined for each discrete zone of the grid depending on conditions in that zone.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: November 24, 2009
    Assignee: Doosan Babcock Energy America LLC
    Inventors: Stuart Arrol, Peter Melling, George Anthony Yates, Michael J. Smith, Gerard J. W. C. Hesselmann, Barbara Lefebvre, John Macphail, Keith W. Morris
  • Method for Zonal Injection of Chemicals into a Furnace Convective Pass to Reduce Pollutants from Flue Gases
    Publication number: 20090047199
    Abstract: Zonal injection of varying compositions of chemicals, particularly an ammonia-based reagent and hydrocarbon, through injection lances arranged in a grid formation to define planar zones in a furnace convective pass of a furnace. The supply of chemicals is controlled so as to be individually determined for each discrete zone of the grid depending on conditions in that zone.
    Type: Application
    Filed: October 29, 2008
    Publication date: February 19, 2009
    Inventors: Stuart Arrol, Peter Melling, G.A. Yates, Michael J. Smith, Gerard J.W.C. Hesselmann, Barbara Lefebvre, John Macphail, Keith W. Morris
  • Methods of Enhancing Power Amplifier Linearity
    Publication number: 20080146168
    Abstract: A novel method of enhancing power amplifier linearity is disclosed. The invention is for use within a transceiver system and provides a method in the digital domain for predistorting a digital modulated signal to compensate for the non-linearity properties of the power amplifier and other components within the transmitter system. The RF output signal of the transmitter circuit is sampled and the corresponding amplitude and phase are detected using a receiver circuit. In dependence upon the amplitude and phase information, a look-up table is indexed to select the predistortion data and predistortion of the digital modulated signal occurs within the predistortion circuit.
    Type: Application
    Filed: February 8, 2005
    Publication date: June 19, 2008
    Applicant: SiGe Semiconductor Inc.
    Inventors: Martin Gordon Jesson, Gareth John Bath, Philip John Macphail
  • Method and apparatus for zonal injection of chemicals into a furnace convective pass to reduce pollutants from flue gases
    Publication number: 20050063887
    Abstract: Zonal injection of varying compositions of chemicals, particularly an ammonia-based reagent and hydrocarbon, through injection lances arranged in a grid formation to define planar zones in a furnace convective pass of a furnace. The supply of chemicals is controlled so as to be individually determined for each discrete zone of the grid depending on conditions in that zone.
    Type: Application
    Filed: May 21, 2004
    Publication date: March 24, 2005
    Inventors: Stuart Arrol, Peter Melling, G.A. Yates, Michael Smith, Gerard Hesselmann, Barbara Lefebvre, John Macphail, Keith Morris
  • Roller stabilizer
    Patent number: 6109374
    Abstract: An improved stabilizing tool includes a body with a pocket, and a roller rotatably disposed in the pocket. The body includes a fluid passageway formed axially therethrough. The passageway has a first zone wherein the pressure of the fluid is relatively high and a second zone wherein the pressure is relatively low. A first conduit provides fluid communication between the first zone and an interior of the roller for the ingress of fluid to the interior, and a second conduit provides fluid communication between the interior of the roller and the second zone for the egress of the fluid back to the fluid passageway.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: August 29, 2000
    Assignee: Orbital Machinig and Manufacturing Ltd.
    Inventors: Constantin Burca, Hugh Gardner, Jim MacPhail, John MacPhail, Constantin Sarbu