Patents by Inventor David Leslie

David Leslie 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).

  • Kaolin products and their production
    Patent number: 7875151
    Abstract: A particulate product comprising kaolin produced from a method wherein the kaolin of a feed suspension is such that not more than 30% by weight has a particle size less than 2 ?m and not more than 30% by weight has a particle size greater than 10 ?m, wherein the kaolin of a product suspension produced is such that not more than 10% by weight has a particle size greater than 10 ?m and not more than 10% by weight has a particle size less than 0.25 ?m, and wherein the particulate product comprises kaolin produced from a fine fraction suspension.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: January 25, 2011
    Assignee: Imerys Minerals Ltd.
    Inventors: Philip Kenneth Johns, David Leslie Light
  • THERMAL BARRIER COATING REMOVAL VIA SHOCKWAVE STRESSES
    Publication number: 20100326971
    Abstract: A method for removing a thermal barrier coating on a surface of a machine component, the method comprising the steps of arranging plural shockwave generators so as to focus shockwave energy on a target area of the machine component; and subjecting the target area of the thermal barrier coating to plural focuses shockwaves such that the thermal barrier coating is caused to delaminate and can be removed from the machine component.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Applicant: General Electric Company
    Inventors: David A. HELMICK, David Leslie Burin
  • METHODS AND SYSTEMS FOR MICROSEISMIC MAPPING
    Publication number: 20100262373
    Abstract: Methods and systems for the detection and localization of microseismic events are proposed which operate in real-time. Hypocenters in three spatial dimensions are provided along with an estimate of the event origin time. Sensor positions may be distributed in 3D space, and are not confined to linear arrays in vertical wells. A location of the event is approximated and a grid search, based on the approximate location of the event, is used to derive a residual function over a finer sampling followed by a gradient search of the residual function to optimize the location of the event.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 14, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: BASSEM KHADHRAOUI, HAROLD DAVID LESLIE, GWENOLA MICHAUD, W. SCOTT LEANEY
  • Alkali resistant glass compositions
    Patent number: 7744689
    Abstract: An alkali resistant glass composition having improved durability to withstand highly alkali environments at elevated temperatures, such as curing of cementitious products in an autoclave, is conveniently formed from economical and abundant materials. The glass composition includes increased levels of calcium and iron, and relatively low levels of alkali metals, as compared to many other alkali resistant glass products, and comprises essentially of, by weight, >35% Si2O3, 1-25% CaO, 1-15% Fe2O3, 1-10% R2O, and an amount of Al2O3 such that the ratio of Si2O3:Al2O3 is greater than or equal to 1. Alkali resistance can be improved by forming a passivity layer on the surface of glass articles by treating the articles hydrothermally in a basic environment. Optionally zirconia and/or titania may be added to the composition to further improve alkali resistance.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: June 29, 2010
    Assignee: James Hardie Technology Limited
    Inventors: Hamid Hojaji, David Leslie Melmeth
  • POLARIMETRIC IMAGING APPARATUS
    Publication number: 20100157298
    Abstract: A polarimetric imaging apparatus (2) and method for distinguishing objects of interest within a scene, said apparatus comprising means for resolving electromagnetic radiation received from the scene having a first substantially circular polarisation state into a first image and for resolving electromagnetic radiation received from the scene having a substantially circular polarisation state of opposite handedness to that of the first circular polarisation state into a second image so as to identify differences there-between, and means for providing an output indicative of the difference there-between, wherein the resolving means is arranged in use to resolve said electromagnetic radiation into said first and second images successively.
    Type: Application
    Filed: July 21, 2008
    Publication date: June 24, 2010
    Applicant: QINETIQ LIMITED
    Inventors: Daniel Robert Hayter, Greg Innes, David Leslie Jordan, John Andrew Haigh
  • Self Retaining Laparoscopic Trocar System-Zisow Trocar Sleeve System
    Publication number: 20100081994
    Abstract: A new concept in laparoscopic trocar systems is presented that could be used with most presently available laparoscopic trocars. The Ethicon XCEL 5 mm trocar is used as the basis for this presentation; however, any other size or system of trocars similarly configured would be compatible with the ZTSS being presented. During laparoscopic surgery trocars often slip out of their original placement through the layers of the abdominal wall surrounding the abdomen. This causes the access to the peritoneal cavity to be lost, often at a critical moment during surgery. This necessitates various maneuvers to replace the trocar which waste time and also predispose the patient to complications such as subcutaneous emphysema and bleeding. The ZTSS would prevent this from happening.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 1, 2010
    Inventor: David Leslie Zisow
  • Electro-hydraulic braking system
    Patent number: 7686404
    Abstract: A hydraulic brake system for a motor vehicle supplies pressurized brake fluid to a wheel brake in response to a demand signal. The brake system includes a master cylinder in fluid communication with the wheel brake to control the actuation thereof. Furthermore, actuation of the master cylinder is controlled and/or amplified by first and second pressure-amplifying mechanisms, which are electrically controlled by an electrical control unit.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: March 30, 2010
    Assignee: Continental Teves, Inc.
    Inventors: Kurt Stouffer Lehmann, Robert Charles Beaver, David Leslie Agnew, Kent Randolph Young
  • Vehicle frame assembly
    Publication number: 20100072732
    Abstract: A vehicle frame assembly (4) which includes an interface portion (10) having first and second mounting regions for releasably mounting on the assembly (4), one behind the other, respective first and second child-carrying units (12) in an echelon formation upwardly relative to the assembly (4) wherein the interface portion (10) is a sub-fame assembly detachably connected to the frame assembly (4).
    Type: Application
    Filed: October 5, 2007
    Publication date: March 25, 2010
    Inventor: David Leslie Offord
  • THERMAL BARRIER COATINGS AND METHODS OF PRODUCING SAME
    Publication number: 20100028711
    Abstract: A thermal insulating ceramic layer for use on metal alloy components exposed to hostile thermal and chemical environment, such as a gas turbine. The thermal barrier coating may include cracks made by a series of steps, including subjecting at least a portion of the thermal barrier coating to a shockwave such that microcracks are formed in the thermal barrier coating without also substantially deforming the substrate.
    Type: Application
    Filed: July 29, 2008
    Publication date: February 4, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: David A. Helmick, David Leslie Burin
  • CONTINUOUS MICROSEISMIC MAPPING FOR REAL-TIME 3D EVENT DETECTION AND LOCATION
    Publication number: 20090259406
    Abstract: A method for the detection and localization of microseismic events is proposed which operates in real-time. It provides hypocenters in three spatial dimensions along with an estimate of the event origin time. Sensor positions may be distributed in 3D space, and are not confined to linear arrays in vertical wells. The method combines and improves two existing approaches. For detection and localization purposes the method makes use of the generalized beam-forming and forward modeling properties defined in the “CMM” algorithm. For location refinement, the method uses a stabilized version of the generalized “Geiger” approach.
    Type: Application
    Filed: April 8, 2009
    Publication date: October 15, 2009
    Applicant: Schlumberger Technology Corporation
    Inventors: Bassem Khadhraoui, Harold David Leslie, Gwenola Michaud, W. Scott Leaney
  • VEHICLE INFORMATION DISPLAY AND METHOD
    Publication number: 20090243827
    Abstract: An information display for a vehicle includes an indicator arrangement having a visual display configured to provide driver demand information to a vehicle driver. The visual display includes a dynamic target range for operating the vehicle, which includes a first boundary and a second boundary indicating a driver demand that would cause the engine to start. A control system includes at least one controller, and is configured to receive at least one input related to current operating conditions of the vehicle and to provide at least one output to the indicator arrangement to position the target range on the visual display and to indicate to the driver a current level of driver demand. In this way, the visual display indicates to the driver the current level of driver demand relative to the position of the target range.
    Type: Application
    Filed: March 25, 2008
    Publication date: October 1, 2009
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Stephen Richard Burke, Angela L. Watson, David Leslie Watson, Michael Scott Lerman, Ryan J. Skaff
  • Manufacture and Use of Engineered Carbide and Nitride Composites
    Publication number: 20090200512
    Abstract: Carbides and nitrides are provided containing a controlled amount of pre-determined diluents and methods for their manufacture and use are disclosed. The pre-determined diluents include at least one of the silica, silicon metal, carbon, alumina, boron oxide, alkaline earth oxides such as calcium oxide, magnesium oxide, alkali oxides such as sodium oxide, potassium oxide, iron oxide, titanium oxide, and other components typically present in glass, ceramics, or metals. The carbides and nitrides with pre-determined diluents are formed by optionally pyrolyzing a precursor material to form a carboneous mixture and heat treating the carboneous mixture for a pre-determined time and at an elevated temperature during which carbon and/or nitrogen reacts with silica in the mixture to form carbides and/or nitrides and controlled amounts of pre-determined diluents.
    Type: Application
    Filed: April 16, 2009
    Publication date: August 13, 2009
    Inventors: Giang BISCAN, Hamid HOJAJI, David Leslie MELMETH, Thinh PHAM, Mark G. STEVENS, Huagang ZHANG
  • Manufacture and use of engineered carbide and nitride composites
    Publication number: 20090156385
    Abstract: Carbides and nitrides are provided containing a controlled amount of pre-determined diluents and methods for their manufacture and use are disclosed. The pre-determined diluents include at least one of the silica, silicon metal, carbon, alumina, boron oxide, alkaline earth oxides such as calcium oxide, magnesium oxide, alkali oxides such as sodium oxide, potassium oxide, iron oxide, titanium oxide, and other components typically present in glass, ceramics, or metals. The carbides and nitrides with pre-determined diluents are formed by optionally pyrolyzing a precursor material to form a carboneous mixture and heat treating the carboneous mixture for a pre-determined time and at an elevated temperature during which carbon and/or nitrogen reacts with silica in the mixture to form carbides and/or nitrides and controlled amounts of pre-determined diluents.
    Type: Application
    Filed: October 29, 2004
    Publication date: June 18, 2009
    Inventors: Giang Biscan, Hamid Hojaji, David Leslie Melmeth, Thinh Pham, Mark G. Stevens, Huagang Zhang
  • Methods and Formulations for Producing Low Density Products
    Publication number: 20090146108
    Abstract: A method of preparing a low-density material and precursor for forming a low-density material is provided. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. Control of the blowing agent can be accomplished via a variety of means including appropriate distribution throughout the precursor, addition of a control agent into the precursor, or modification of the firing conditions such as oxygen deficient or fuel rich environment, plasma heating etc.
    Type: Application
    Filed: November 6, 2008
    Publication date: June 11, 2009
    Inventors: Amlan Datta, Hamid Hojaji, Shannon Marie Labernik, David Leslie Melmeth, Thinh Pham, Huagang Zhang
  • Apparatus and method for performing internal routing and signal processing
    Patent number: 7542099
    Abstract: A system for performing signal processing includes a system input, wherein a first signal having a first format, and supplied on a first system input is selected by a user for format conversion. A switching circuit having plural switching circuit inputs and plural switching circuit outputs is provided for routing the first signal, received via a first switching circuit input, to a first switching circuit output. A processor is connected with the switching circuit for converting the first signal received via the first switching circuit output into a second signal having a second format, wherein the second signal is supplied to a second switching circuit input, and output to a first system output via a second switching circuit output.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: June 2, 2009
    Assignee: Pesa Switching Systems, Inc.
    Inventors: David Leslie Ellgen, Harlan Keith Bond, Steven Miller
  • Automated Processing of Electrophysiological Data
    Publication number: 20090099468
    Abstract: A method (100), an apparatus, and a computer program product are disclosed for automated processing of intracardiac electrophysiological data.
    Type: Application
    Filed: December 20, 2005
    Publication date: April 16, 2009
    Inventors: Aravinda Thiagalingam, Pramesh Kovoor, David Leslie Ross
  • KAOLIN PRODUCTS AND THEIR PRODUCTION
    Publication number: 20090065163
    Abstract: A particulate product comprising kaolin produced from a method wherein the kaolin of a feed suspension is such that not more than 30% by weight has a particle size less than 2 ?m and not more than 30% by weight has a particle size greater than 10 ?m, wherein the kaolin of a product suspension produced is such that not more than 10% by weight has a particle size greater than 10 ?m and not more than 10% by weight has a particle size less than 0.25 ?m, and wherein the particulate product comprises kaolin produced from a fine fraction suspension.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 12, 2009
    Inventors: Philip Kenneth Johns, David Leslie Light
  • Methods and Apparatus for Product Authentication
    Publication number: 20090051485
    Abstract: A method for product authentication, comprising applying to the genuine products code on a label, the code being generated by an algorithm, which code is unique to a small sub-set of articles, preferably for a single such article, so that it can be assumed that any product on the market which either does not have a label or has a wrong label, or for which the label is otherwise accounted for, is counterfeit, the label being machine readable, such as a writeable RFID tag characterised in that the label comprises a machine-readable microcircuit to which a code can be written, and from which the written code can be read remotely.
    Type: Application
    Filed: March 9, 2005
    Publication date: February 26, 2009
    Applicant: ADVANCED ANALYSIS AND INTEGRATION LIMITED
    Inventors: John Joseph Corry, David Leslie McNeight
  • POLYMER FILAMENTS
    Publication number: 20090014920
    Abstract: The invention relates to polymer filaments and methods for their production. In particular, although not exclusively, the invention relates to conducting polymer filaments and their production from solutions of polymerisable oxidizable monomer units.
    Type: Application
    Filed: June 24, 2005
    Publication date: January 15, 2009
    Applicant: MASSEY UNIVERSITY
    Inventors: Warwick John Belcher, Alan Graham MacDiarmid, David Leslie Officer, Simon Berners Hall
  • Authentication of Re-Presentable Items
    Publication number: 20090009285
    Abstract: A system for authenticating re-presentable items, such as currency notes and passports, comprises applying to each item a unique code, reading the code on presentation, and checking the code against a database, characterised in that at each check, the code is altered.
    Type: Application
    Filed: April 28, 2005
    Publication date: January 8, 2009
    Inventors: John Joseph Corry, David Leslie McNeight