Macdonald, TX
Allan Macdonald, Austin, TX US
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20100127243 | BI-LAYER PSEUDO-SPIN FIELD-EFFECT TRANSISTOR - A bi-layer pseudo-spin field-effect transistor (BiSFET) is disclosed. The BiSFET includes a first and second conduction layers separated by a tunnel dielectric. The BiSFET transistor also includes a first gate separated from the first conduction layer by an insulating dielectric layer, and a second gate separated from the second conduction layer by an insulating layer. These conduction layers may be composed of graphene. The voltages applied to the first and/or second gates can control the peak current and associated voltage value for current flow between top and bottom conduction channels, and interlayer current voltage characteristic exhibiting negative differential resistance. BiSFETs may be used to make a variety of logic gates. A clocked power supply scheme may be used to facilitate BiSFET-based logic. | 05-27-2010 |
20120212257 | BI-LAYER PSEUDO-SPIN FIELD-EFFECT TRANSISTOR - A bi-layer pseudo-spin field-effect transistor (BiSFET) is disclosed. The BiSFET includes a first and second conduction layers separated by a tunnel dielectric. The BiSFET transistor also includes a first gate separated from the first conduction layer by an insulating dielectric layer, and a second gate separated from the second conduction layer by an insulating layer. These conduction layers may be composed of graphene. The voltages applied to the first and/or second gates can control the peak current and associated voltage value for current flow between top and bottom conduction channels, and interlayer current voltage characteristic exhibiting negative differential resistance. BiSFETs may be used to make a variety of logic gates. A clocked power supply scheme may be used to facilitate BiSFET-based logic. | 08-23-2012 |
20120273763 | Topological Insulator-Based Field-Effect Transistor - A Topological INsulator-based field-effect transistor (TINFET) is disclosed. The TINFET includes a first and second gate dielectric layers separated by a topological insulator (TI) layer. A first gate contact is connected to the first gate dielectric layer on the surface that is opposite the TI layer. A second gate contact may be connected to the second gate dielectric layer on the surface that is opposite the TI layer. A first TI surface contact is connected to one surface of the TI layer, and a second TI surface contact is connected to the second surface of the TI layer. | 11-01-2012 |
Colin Macdonald, Austin, TX US
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20150286768 | Routing Standard Cell-Based Integrated Circuits - This disclosure describes a multi-height routing cell and utilization of the multi-height routing in an integrated circuit to reduce routing congestion in a standard cell design floorplan. The multi-height routing cell includes a bypass connection, or “tunnel,” that routes a signal through a non-routing layer and under an impeding power rail. The multi-height routing cell includes bypass connectors on both sides of the bypass connection that provide connection points for which to connect standard cells on opposite sides of the impeding power rail. As such, the multi-height routing cell provides a route underneath the impeding power rail and, in turn, reducing routing congestion in the standard cell design floorplan. | 10-08-2015 |
Craig Macdonald, Houston, TX US
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20140049036 | ISOLATION RING ON GAP SUB - A gap sub comprises at least one, and in a preferred embodiment, two electrically isolating threaded joints in a conductive tubular collar. The threads of the joints are isolated by a non-conductive coating in accordance with the prior art. The shoulders of the joints are separated by an isolating ring. Annular faces on the ring make contact with the shoulders in the joints. The ring is made of conductive material with a non-conductive coating deployed on (1) at least one, and advantageously both, of the ring's annular faces, and (2) the interior surface of the ring. An annular recess in the collar prevents electrical contact between collar sections nearby the ring either side of each threaded joint. | 02-20-2014 |
20140265304 | COMPOSITE ISOLATION JOINT FOR GAP SUB OR INTERNAL GAP - A non-conductive composite insert is provided between conductive portions, useful, for example, in downhole EM telemetry applications as an external “gap sub” in a drill collar, or as a sonde-based internal gap. In a preferred embodiment, the composite is made from a glass-fiber reinforced plastic, and separates non-magnetic conductive portions made from stainless steel. The composite insert provides a slanted or tapered transition into the conductive portions at either or both ends of the insert. The transitions on the composite insert may comprise one or more tapered surfaces, which may be male or female in configuration with respect to matching transitions on the conductive portions. The transitions may be bonded together by adhesive, or alternatively may be threaded. | 09-18-2014 |
Duncan Macdonald, Houston, TX US
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20090194333 | RANGING METHODS FOR DEVELOPING WELLBORES IN SUBSURFACE FORMATIONS - A method for forming two or more wellbores in a subsurface formation includes forming a first wellbore in the formation. A second wellbore is directionally drilled in a selected relationship relative to the first wellbore. At least one magnetic field is provided in the second wellbore using one or more magnets in the second wellbore located on a drilling string used to drill the second wellbore. At least one magnetic field is sensed in the first wellbore using at least two sensors in the first wellbore as the magnetic field passes by the at least two sensors while the second wellbore is being drilled. A position of the second wellbore is continuously assessed relative to the first wellbore using the sensed magnetic field. The direction of drilling of the second wellbore is adjusted so that the second wellbore remains in the selected relationship relative to the first wellbore. | 08-06-2009 |
E. Arthur Macdonald, Mckinney, TX US
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20140096920 | ROLLER SHADE ASSEMBLY ADJUSTMENT MECHANISM - In various implementations, a roller shade assembly may include an elongated body and a mechanism. The mechanism may include gears and a spring. The mechanism may allow the roller shade to be locked and/or unlocked using a driver. Internal component(s) of the roller shade may be adjusted using the driver. | 04-10-2014 |
Eric Macdonald, El Paso, TX US
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20100086442 | Biosensor to Detect Infectious Agents - The present invention provides a sensor for the detection of chemical agents in real time. The sensor includes a sample region having a detector disposed about a substrate where a chemical agent binds to the detector to generate in a signal. The sensor includes a microcontroller in communication with the detector, an analog to digital converter, and a communication module to process the signal into an analytical signal. In addition, the sensor includes an antenna in communication with the microcontroller to enable a wireless communication network, wherein the analytical signal can be transmitted and a power source in operable communication with the microcontroller to supply a source of power to the sensor. | 04-08-2010 |
20110222710 | METHOD AND APPARATUS FOR AUTOMATICALLY REDUCING A VOLUME LEVEL OF AN AUDIO SIGNAL PROVIDED TO A USER - The present invention provides a method of automatically reducing a volume level of an audio signal provided to a user. An audio signal is received, the audio signal is provided to the and a current hearing threshold for the user based on one or more psychophysical or electrophysiological responses of the user to the audio signal provided to the user is determined. A temporary threshold shift (TTS) based on the current hearing threshold is determined. If the TTS is above the specified TTS, the volume level of the audio signal provided to the user is automatically reduced. | 09-15-2011 |
20130170171 | EXTRUSION-BASED ADDITIVE MANUFACTURING SYSTEM FOR 3D STRUCTURAL ELECTRONIC, ELECTROMAGNETIC AND ELECTROMECHANICAL COMPONENTS/DEVICES - The present invention provides a system and method for making a three-dimensional electronic, electromagnetic or electromechanical component/device by: (1) creating one or more layers of a three-dimensional substrate by depositing a substrate material in a layer-by-layer fashion, wherein the substrate includes a plurality of interconnection cavities and component cavities; (2) filling the interconnection cavities with a conductive material; and (3) placing one or more components in the component cavities. | 07-04-2013 |
20140268604 | Methods and Systems For Embedding Filaments in 3D Structures, Structural Components, and Structural Electronic, Electromagnetic and Electromechanical Components/Devices - The present invention provides systems and methods for embedding a filament or filament mesh in a three-dimensional structure, structural component, or structural electronic, electromagnetic or electromechanical component/device by providing at least a first layer of a substrate material, and embedding at least a portion of a filament or filament mesh within the first layer of the substrate material such the portion of the filament or filament mesh is substantially flush with a top surface of the first layer and a substrate material in a flowable state is displaced by the portion of the filament and does not substantially protrude above the top surface of the first layer, allowing the continuation of an additive manufacturing process above the embedded filament or filament mesh. A method is provided for creating interlayer mechanical or electrical attachments or connections using filaments within a three-dimensional structure, structural component, or structural electronic, electromagnetic or electromechanical component/device. | 09-18-2014 |
20140268607 | Methods and Systems For Connecting Inter-Layer Conductors and Components in 3D Structures, Structural Components, and Structural Electronic, Electromagnetic and Electromechanical Components/Devices - The present invention provides systems and methods for creating interlayer mechanical or electrical attachments or connections using filaments within a three-dimensional structure, structural component, or structural electronic, electromagnetic or electromechanical component/device. | 09-18-2014 |
20150014923 | ELECTRONIC GAMING DIE - An electronic gaming die includes an enclosure, a flexible substrate, a number of light emitting diodes, a sensor, a processor and a battery. The enclosure has N sides where N is equal to or greater than 4. The flexible substrate folds into N sides and fits into an interior of the enclosure, wherein each side has an inner face, an outer face and is assigned an integer from 1 to N. The light emitting diodes are disposed on the outer face of each side of the flexible substrate, wherein the number of light emitting diodes equals the integer assigned to the side of the flexible substrate. The sensor, processor and battery are disposed on one of the inner faces of the flexible substrate. | 01-15-2015 |
James William Macdonald, The Woodlands, TX US
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20140000889 | WIRELINE FLOW THROUGH REMEDIATION TOOL | 01-02-2014 |
Jeanne M. Macdonald, Sugar Land, TX US
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20150274907 | Propylene Polymers - This invention relates in one aspect to propylene polymers comprising propylene, said polymers having a melt flow rate (MFR, ASTM 1238, 230° C., 2.16 kg) of 10 dg/min to 25 dg/min; a Dimensionless Stress Ratio/Loss Tangent Index R | 10-01-2015 |
Jeanne Marie Macdonald, Sugar Land, TX US
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20140155854 | POLYPROPYLENE FIBERS AND FABRICS - This invention relates to polypropylene fibers and fabrics containing polypropylene fibers, the fibers comprising propylene polymers comprising at least 50 mol % propylene, said polymers having: a) a melt flow rate (MFR, ASTM 1238, 230° C., 2.16 kg) of about 10 dg/min to about 25 dg/min; b) a dimensionless Stress Ratio/Loss Tangent Index R | 06-05-2014 |
Martin R. Macdonald, Plano, TX US
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20110278151 | Method for Producing Base Lubricating Oil from Waste Oil - A method for recovering base oil from waste lubricating oil by separating base oil range constituents from a waste lubricating oil mixture, thereafter separating higher quality base oil constituents and lower quality base oil constituents from the base oil recovered from the waste lubricating oil mixture and thereafter treating the lower quality base oil constituents to produce marketable base oil. The total base oil produced from a waste lubricating oil mixture by this process is greater than the quantity producible by previous processes using only base oil separation from the waste lubricating oil mixture or processes which use only treatment of the base oil recovered from the waste lubricating oil mixture to produce the product base oil. | 11-17-2011 |
20140251869 | METHOD FOR PRODUCING BASE LUBRICATING OIL FROM OILS RECOVERED FROM COMBUSTION ENGINE SERVICE - A method for producing ILSAC GF5 or higher compatible oils from used oil, comprising separating material having a boiling point less than about 350° F. from recovered oil to produce de-volatized oil fraction and light oil fraction. Separating material with a boiling point greater than about 350° F. and less than about 650° F. from the de-volatized oil fraction to produce fuel oil fraction and heavy oil fraction. Separating material with a boiling point greater than about 1200° F. from the heavy oil fraction to produce partially purified oil fraction and residual fraction. Treating the partially purified oil fraction to separate it into purified oil fraction and contaminant fraction. Hydrogenating the contaminant fraction to remove predetermined compounds, further saturating the fraction and thereby creating a saturated oil fraction. Fractionating the saturated oil stream to produce one or more of naphtha fraction, diesel oil fraction and base oil fraction. | 09-11-2014 |
20140257000 | METHOD FOR PRODUCING BASE LUBRICATING OIL FROM OILS RECOVERED FROM COMBUSTION ENGINE SERVICE - A method for producing ILSAC GF5 or higher compatible oils from used oil, comprising separating material having a boiling point less than about 350° F. from recovered oil to produce de-volatized oil fraction and light oil fraction. Separating material with a boiling point greater than about 350° F. and less than about 650° F. from the de-volatized oil fraction to produce fuel oil fraction and heavy oil fraction. Separating material with a boiling point greater than about 1200° F. from the heavy oil fraction to produce partially purified oil fraction and residual fraction. Treating the partially purified oil fraction to separate it into purified oil fraction and contaminant fraction. Hydrogenating the contaminant fraction to remove predetermined compounds, further saturating the fraction and thereby creating a saturated oil fraction. Fractionating the saturated oil stream to produce one or more of naphtha fraction, diesel oil fraction and base oil fraction. | 09-11-2014 |
20140257008 | METHOD AND APPARATUS FOR RECOVERING SYNTHETIC OILS FROM COMPOSITE OIL STREAMS - A method for recovering synthetic oils from a feed stream, the method comprising separating at least a portion of the non-synthetic oil constituents from a commingled stream to produce a partially purified synthetic oil stream and one or more contaminant streams. Extracting at least a portion of the synthetic oil from the partially purified synthetic oil stream to produce a synthetic oil stream and a second contaminant stream. | 09-11-2014 |
20140257009 | METHOD AND APPARATUS FOR RECOVERING SYNTHETIC OILS FROM COMPOSITE OIL STREAMS - A method for recovering synthetic oils from a feed stream, the method comprising separating at least a portion of the non-synthetic oil constituents from a commingled stream to produce a partially purified synthetic oil stream and one or more contaminant streams. Extracting at least a portion of the synthetic nil from the partially purified synthetic oil stream to produce a synthetic oil stream and a second contaminant stream. | 09-11-2014 |
20150129412 | METHOD FOR PRODUCING BASE LUBRICATING OIL FROM WASTE OIL - A method for recovering base oil from waste lubricating oil by separating base oil range constituents from a waste lubricating oil mixture, thereafter separating higher quality base oil constituents and lower quality base oil constituents from the base oil recovered from the waste lubricating oil mixture and thereafter treating the lower quality base oil constituents to produce marketable base oil. The total base oil produced from a waste lubricating oil mixture by this process is greater than the quantity producible by previous processes using only base oil separation from the waste lubricating oil mixture or processes which use only treatment of the base oil recovered from the waste lubricating oil mixture to produce the product base oil. | 05-14-2015 |
Michael Macdonald, Alvarado, TX US
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20110030954 | USE OF SWELLABLE MATERIAL IN AN ANNULAR SEAL ELEMENT TO PREVENT LEAKAGE IN A SUBTERRANEAN WELL - A method of sealing an annulus formed between a casing string and a surface in a well includes: positioning a seal element in the annulus, a swellable material of the seal element being positioned between the casing string and the surface; and flowing cement through a channel formed between the swellable material and the casing string. A method of sealing in a well includes the steps of: positioning an annular seal element comprising a swellable material in the well; and flowing cement into at least one channel formed longitudinally through the seal element. A method of sealing an annulus between two casing strings includes: providing multiple arcuate segments, each of the segments comprising a swellable material; and installing the segments in the annulus, each of the segments thereby occupying a respective circumferential portion of the annulus. | 02-10-2011 |
Michael Macdonald, Cleburne, TX US
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20100126735 | Use of Swellable Material in an Annular Seal Element to Prevent Leakage in a Subterranean Well - A method of sealing an annulus formed between a casing string and a surface in a well includes: positioning a seal element in the annulus, a swellable material of the seal element being positioned between the casing string and the surface; and flowing cement through a channel formed between the swellable material and the casing string. A method of sealing in a well includes the steps of: positioning an annular seal element comprising a swellable material in the well; and flowing cement into at least one channel formed longitudinally through the seal element. A method of sealing an annulus between two casing strings includes: providing multiple arcuate segments, each of the segments comprising a swellable material; and installing the segments in the annulus, each of the segments thereby occupying a respective circumferential portion of the annulus. | 05-27-2010 |
Robert Macdonald, Houston, TX US
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20130048379 | Controlled Full Flow Pressure Pulser for Measurement While Drilling (MWD) Device - An apparatus, method, and system described for generating pressure pulses in drilling fluid utilizing a flow throttling device which includes a controllable pulser operating sequentially within a downhole assembly within a drill string of a drill pipe. The system includes drilling fluid, fluid flow, and fluid drilling pump which when combined creates fluid flow into a bore pipe annulus within the downhole assembly creating a base line bore pipe pressure wherein bore pipe pressure is sensed via a sensor and information is sent to a Digital Signal Processor (DSP) that interprets the information. The DSP also receives information from an annulus pressure sensor that senses drilling fluid pressure as it returns to the pump. The DSP recognizes pressure variation input from the annulus pressure sensor and bore pipe pressure sensor and detects pressure variation providing signals as data information to the DSP, determining required action to adjust pulser operation. | 02-28-2013 |
20150300153 | Controlled Pressure Pulser for Coiled Tubing Measurement While Drilling Applications - An apparatus and system for generating pressure pulses for enhancing and completing a well bore within a coiled tubing assembly including: a CT-MWD-FTD tool longitudinally and axially positioned within the center of a main valve assembly including a main valve. The drilling fluid is subsequently split into both an inlet main fluid stream and a pilot fluid stream, wherein the pilot fluid stream subsequently flows such that the pilot fluid recombines with the main flow stream to become a main exit fluid flow. The main exit fluid flow then proceeds toward a motor housing wherein one or more annular pressure sensors measure the pressure of fluid flow with sensors that send signals to a Digital Signal Processor (DSP) that controls flow throttling devices which generate controllable, large, rapid and measurable energy pulses. | 10-22-2015 |
Susan S. Macdonald, Georgetown, TX US
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20080248408 | Photomask and Method for Forming a Non-Orthogonal Feature on the Same - A photomask and method for forming a non-orthogonal feature on the photomask are provided. A method for forming a non-orthogonal feature on a photomask blank includes providing a mask layout file including a primitive shape and fracturing the primitive shape to create a plurality of writeable shapes in a mask pattern file. A non-orthogonal feature formed by the writeable shapes is formed on a photomask blank by using a lithography system to image the writeable shapes from the mask pattern file onto a resist layer of the photomask blank. | 10-09-2008 |
20100215909 | Photomask for the Fabrication of a Dual Damascene Structure and Method for Forming the Same - A photomask for the fabrication of dual damascene structures and a method for forming the same are provided. A method for fabricating a multilayer step-and-print lithography (SFIL) template includes providing a blank having a substrate, an absorber layer and a first resist layer. A metal layer pattern of a dual damascene structure is formed in the substrate at a first depth using a lithography system. The first resist layer is removed from the blank and a second resist later is applied. The lithography system is used to form a via layer pattern of the dual damascene structure at the first depth while the metal layer pattern is simultaneously etched to a second depth. | 08-26-2010 |
Travis Macdonald, Boling, TX US
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20150300107 | Variable Length Fill Up Tool and Valve - A fill up tool has an adjustable length to selectively lengthen the fill up a tool or retract to be positioned completely above the elevator so that elevator movement will not interfere with the fill up tool. The seal is fixed to the tool so that the load caused by the pressurized seal does not have to be balanced by the operating force of the piston. A full open valve is operated when the tool is extended to fill up or take flow back. | 10-22-2015 |