Patents by Inventor David L. Johnson

David L. Johnson 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: 7334661
    Abstract: An acoustic logging tool sleeve with a preferably discontinuous, alternating structure that is acoustically opaque in some zones, and acoustically transparent in others. The sleeve may be modular, with several stages connected together. The multiple stages provide a sleeve that may be useful with a variety of borehole logging tools to reduce or eliminate the transmission of noise to the receiving elements.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: February 26, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Jahir Pabon, Chung Chang, David L. Johnson, Vivian Pistre, Tarek Habashy, Smaine Zeroug, Toshihiro Kinoshita, Hitoshi Sugiyama, Hiroshi Hori, Atsushi Saito
  • Publication number: 20070251863
    Abstract: This invention relates to the catalytic cracking of a hydrocarbon feed. In particular, this invention relates to an apparatus and process utilizing a catalyst stripper section of a fluid catalytic cracking (FCC) reactor with chordal trays designed to provide improved stripping of hydrocarbons from spent FCC catalyst in an FCC reactor stripping zone.
    Type: Application
    Filed: March 28, 2007
    Publication date: November 1, 2007
    Inventors: Brian A. Cunningham, Christopher G. Smalley, Richard C. Senior, Joseph S. Famolaro, Rathna P. Davuluri, David L. Johnson, James H. Beech, Jeffrey S. Smith
  • Patent number: 7119239
    Abstract: A process is provided for the production of xylenes from reformate. The process is carried out by methylating under conditions effective for the methylation, the benzene/toluene present in the reformate outside the reforming loop, to produce a resulting product having a higher xylenes content than the reformate. Greater than equilibrium amounts of para-xylene can be produced by the process.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: October 10, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: David L. Johnson, Robert G. Tinger, Robert A. Ware, John S. Buchanan, Xiaobing Feng, Shifang Luo, Gary D. Mohr
  • Patent number: 7095676
    Abstract: Tube waves are used to locate and characterize a solids deposit inside a fluid-filled pipe. An acoustic tube wave pulse is transmitted along the pipe. On encountering a solids deposit, the tube wave pulse is perturbed and partially reflected by changes in the boundary conditions between the fluid and the pipe to produce two deposit-modified acoustic waves. One is a perturbed wave travelling in the same direction as the tube wave pulse. The other is a reflected wave travelling in the opposite direction. One of these deposit-modified acoustic waves is received to produce an acoustic signal. Accumulated acoustic signals are processed by Fast-Fourier Transform to produce frequency-based digital data. Phase data from the frequency-based digital data is inverted to produce slowness spectrum data. Power data from the frequency-based digital data is inverted to produce attenuation spectrum data. Spectrum data is used to locate a solids deposit in the pipe.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: August 22, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Ralph M. D'Angelo, Kenneth W. Winkler, David L. Johnson, Gale Gustavson, Oliver C. Mullins
  • Patent number: 7040143
    Abstract: A method, apparatus and system for testing characteristics of a material sample is provided. The system includes an apparatus configured to house the material test sample while defining a sealed volume against a surface of the material test sample. A source of pressurized fluid is in communication with, and configured to pressurize, the sealed volume. A load applying apparatus is configured to apply a defined load to the material sample while the sealed volume is monitored for leakage of the pressurized fluid. Thus, the inducement of surface defects such as microcracking and crazing may be detected and their effects analyzed for a given material. The material test samples may include laminar structures formed of, for example, carbon cloth phenolic, glass cloth phenolic, silica cloth phenolic materials or carbon-carbon materials. In one embodiment the system may be configured to analyze the material test sample while an across-ply loading is applied thereto.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: May 9, 2006
    Assignee: Alliant Techsystems Inc.
    Inventors: David L. Johnson, Karl D. Kersker, David E. Richardson, Troy C. Stratton
  • Patent number: 7037494
    Abstract: A composition is disclosed from controlling an insect population including an insect food stuff and an insecticidally effective amount of at least one Gram negative bacteria, viable, dead or alive, and/or an extract thereof, where the composition is applied to an area accessible to the insects and results in insect death. The compositions are ideally suited for the control of fire ants, cockroaches, carpenter ants and termites. For fire ant and cockroach control, the food stuff is a carbohydrate rich material, while for carpenter ant and termite control, the food stuff is a cellulosic rich material. The composition is applied to the area as a single treatment or as a periodic treatment in an amount have from about 5×109 to about 1×1013 bacteria or extracts from that number of bacteria.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: May 2, 2006
    Assignee: The Board of Regents of the University of Texas System
    Inventors: Stephen J. Mattingly, David L. Johnson
  • Patent number: 6921244
    Abstract: Disclosed is a system for operating gas turbine engine bleed valves in response to pressure values within the engine, wherein the engine pressure values are sensed electronically and routed to a programmable logic device, and wherein the programmable logic device control the opening and closing of the bleed valves in a manner that allows for reduced engine vibration with minimal loss of engine efficiency.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: July 26, 2005
    Inventor: David L. Johnson
  • Patent number: 6864710
    Abstract: A programmable logic device comprising one or more horizontal routing channels, one or more vertical routing channels, and a logic element. Each logic element may be configured to connect between one of the horizontal routing channels and one of the vertical routing channels. The logic element may comprise a logic block cluster and a memory block.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: March 8, 2005
    Assignee: Cypress Semiconductor Corp.
    Inventors: Timothy M. Lacey, David L. Johnson
  • Publication number: 20040220497
    Abstract: This invention relates to an apparatus and method for infusing fluids to and aspirating tissue from an intraosseous site. The apparatus is comprised of an infusion tube coupled to an introducer with a release mechanism that removes the force exerted on the infusion tube once it has penetrated the bone a predetermined depth. As the introducer is withdrawn, the infusion tube remains in the bone. The ball release mechanism and other aspects of the apparatus can be modified to yield different penetration depths. The present invention also relates to a method and apparatus for locating the site of infusion and for relieving strain and stress on the infusion site. The template patch uses a key anatomical feature of the bone as a reference point to a target zone for infusion that is located a predetermined distance away from the feature. The template patch has a tube clamp and a covering that protect the infusion site from external forces.
    Type: Application
    Filed: June 4, 2004
    Publication date: November 4, 2004
    Inventors: Judith M. Findlay, David L. Johnson, Misha Krasnich, Michael W. Jacobs
  • Publication number: 20040158111
    Abstract: A process is provided for the production of xylenes from reformate. The process is carried out by methylating under conditions effective for the methylation, the benzene/toluene present in the reformate outside the reforming loop, to produce a resulting product having a higher xylenes content than the reformate. Greater than equilibrium amounts of para-xylene can be produced by the process.
    Type: Application
    Filed: December 24, 2003
    Publication date: August 12, 2004
    Inventors: David L. Johnson, Robert G. Tinger, Robert A. Ware, John S. Buchanan, Xiaobing Feng, Shifang Luo, Gary D. Mohr
  • Patent number: 6761726
    Abstract: This invention relates to an apparatus and method for infusing fluids to and aspirating tissue from an intraosseous site. The apparatus is comprised of an infusion tube coupled to a housing assembly with a release mechanism that removes the force exerted on the infusion tube once it has penetrated the bone a predetermined depth. As the housing assembly is withdrawn, the infusion tube remains in the bone. The ball release mechanism and other aspects of the apparatus can be modified to yield different penetration depths.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: July 13, 2004
    Assignee: Pyng Medical Corp.
    Inventors: Judith M. Findlay, David L. Johnson, Misha Krasnich, Michael W. Jacobs
  • Patent number: 6642426
    Abstract: A system and process for producing xylene and other alkylated aromatics includes one or more fluidized bed reaction zones that provide contact between the reactants (i.e., an aromatic reactant and an alkylating reagent). Improved conversion and selectivity is realized when the alkylating reagent is stagewise injected into the fluidized bed at one or more locations downstream from the location of aromatic reactant introduction into the fluidized bed. Preferably, the alkylating reagent is introduced at a plurality of locations along the axial direction of the fluidized bed reaction zone, or at plural locations between a plurality of different fluidized bed reaction zones.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: November 4, 2003
    Inventors: David L. Johnson, Robert G. Tinger, Robert A. Ware, Sergei Yurchak
  • Publication number: 20030198824
    Abstract: A photocurable composition, including (a) a cationically curable monomer; (b) a radically curable monomer; (c) reactive particles comprising a crosslinked polysiloxane core and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; (d) a radical photoinitiator; and (e) a cationic photoinitiator. A method of making a 3-D object from such a composition. A 3-D object made by the method.
    Type: Application
    Filed: April 19, 2002
    Publication date: October 23, 2003
    Inventors: John W. Fong, David L. Johnson
  • Publication number: 20030185100
    Abstract: Tube waves are used to locate and characterize a solids deposit inside a fluid-filled pipe. An acoustic tube wave pulse is transmitted along the pipe. On encountering a solids deposit, the tube wave pulse is perturbed and partially reflected by changes in the boundary conditions between the fluid and the pipe to produce two deposit-modified acoustic waves. One is a perturbed wave travelling in the same direction as the tube wave pulse. The other is a reflected wave travelling in the opposite direction. One of these deposit-modified acoustic waves is received to produce an acoustic signal. Accumulated acoustic signals are processed by Fast-Fourier Transform to produce frequency-based digital data. Phase data from the frequency-based digital data is inverted to produce slowness spectrum data. Power data from the frequency-based digital data is inverted to produce attenuation spectrum data. Spectrum data is used to locate a solids deposit in the pipe.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 2, 2003
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ralph M. D'Angelo, Kenneth W. Winkler, David L. Johnson, Gale Gustavson, Oliver C. Mullins
  • Patent number: 6608500
    Abstract: An apparatus comprising an input/output circuit and a programmable logic device. The input/output circuit may be configured to (i) connect to an end of a bus and (ii) operate in one or more modes in response to one or more control signals. The programmable logic device may be configured to generate said one or more control signals.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: August 19, 2003
    Assignee: Cypress Semiconductor Corp.
    Inventors: Timothy M. Lacey, David L. Johnson
  • Publication number: 20030129052
    Abstract: Disclosed is a system for operating gas turbine engine bleed valves in response to pressure values within the engine, wherein the engine pressure values are sensed electronically and routed to a programmable logic device, and wherein the programmable logic device control the opening and closing of the bleed valves in a manner that allows for reduced engine vibration with minimal loss of engine efficiency.
    Type: Application
    Filed: December 4, 2002
    Publication date: July 10, 2003
    Inventor: David L. Johnson
  • Publication number: 20030121152
    Abstract: Disclosed are processes to recreate the as-manufactured or as-installed shape and finish to worn fuel pump bearings, wherein such processes entail either restoring or replacing the bearings, and further entail placing a resurfacing compound and a final top coating onto the top surface of the bearing.
    Type: Application
    Filed: December 4, 2002
    Publication date: July 3, 2003
    Inventor: David L. Johnson
  • Patent number: 6557254
    Abstract: Metallic track members having locking slots designed for receiving and retaining metallic stud members that contain construction aids enable the assembly of metallic frames used in the construction of buildings. A flat metallic strip is converted to a W-shaped metallic track member by a series of stamping, bending and severing steps. U-shaped stud members, manufactured in a similar manner are inserted into the track members and held relatively stable by upper and lower track members. An upper track member can be the same shaped design as the lower member or can be U-shaped with stud retaining means into which the stud members can slip-fit. The process for manufacturing is adaptable for computer aided manufacturing using data from the computer aid design of the building. Manufacturing equipment for the manufacture of the construction members is relatively light-weight and can be transported to the job site.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: May 6, 2003
    Inventor: David L. Johnson
  • Publication number: 20030068304
    Abstract: A composition is disclosed from controlling an insect population including an insect food stuff and an insecticidally effective amount of at least one Gram negative bacteria, viable, dead or alive, and/or an extract thereof, where the composition is applied to an area accessible to the insects and results in insect death. The compositions are ideally suited for the control of fire ants, cockroaches, carpenter ants and termites. For fire ant and cockroach control, the food stuff is a carbohydrate rich material, while for carpenter ant and termite control, the food stuff is a cellulosic rich material. The composition is applied to the area as a single treatment or as a periodic treatment in an amount have from about 5×109 to about 1×1013 bacteria or extracts from that number of bacteria.
    Type: Application
    Filed: February 13, 2002
    Publication date: April 10, 2003
    Inventors: Stephen J. Mattingly, David L. Johnson
  • Patent number: RE38255
    Abstract: A process which provides electronic access to pre-paid funds for cash or payment for goods and services. A card is issued to a customer with a value selectable by the customer. The card has a magnetic stripe with an encoded card number including a bank identification number (BIN) and an account number. The central card processor establishes a zero balance database including the card numbers, but with blank fields for the customer data and the value of the account. When a customer purchases a card, the sales agent transmits to the central database computer which fills in the blanks in the database, activating the account, and transmits an acknowledgement signal back to the sales agent. The customer can immediately use the card in ATM or other remote terminals to acquire cash or purchase goods and services. The customer inputs a PIN number which is provided with the card, or a customer selected alternative PIN number.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: September 23, 2003
    Assignee: Visa International Service Association
    Inventors: Jack Levine, Priscilla C. Brandt, Nydia Jackson, David L. Johnson, Helen Clark