Patents by Inventor David E. Clark

David E. Clark 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: 7134496
    Abstract: Single phase microemulsions improve the removal of filter cakes formed during drilling with invert emulsions. The single phase microemulsion removes oil and solids from the deposited filter cake. Optionally, an acid capable of solubilizing the filter cake bridging particles may also be used with the microemulsion. In one non-limiting embodiment the acid may be a polyamino carboxylic acid. Skin damage removal from internal and external filter cake deposition can be reduced.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: November 14, 2006
    Assignee: Baker Hughes Incorporated
    Inventors: Thomas A. Jones, David E. Clark, Lirio Quintero, Bruce Rae Ewen
  • Publication number: 20040192767
    Abstract: Compounds of formula (I): 1
    Type: Application
    Filed: January 29, 2004
    Publication date: September 30, 2004
    Inventors: Alexander W. Oxford, Richard J. Davis, Robert A. Coleman, Kenneth L. Clark, David E. Clark, Neil V. Harris, Garry Fenton, George Hynd, Keith A.J. Stuttle, Jonathan M. Sutton, Christopher G. Newton
  • Patent number: 6789659
    Abstract: A stator winding system and method includes a winding pallet on transport pallet arrangement, with the winding pallet holding the stator and being removed from the transport pallet for a winding operation.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: September 14, 2004
    Assignee: Odawara Automation, Inc.
    Inventors: Christopher R. Spejna, Taggert McGough, David E. Clark
  • Patent number: 6690190
    Abstract: An electric motor component testing system includes test stations located along different conveyor lanes.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: February 10, 2004
    Assignee: Odawara Automation, Inc.
    Inventors: Taggert McGough, David E. Clark
  • Publication number: 20030121758
    Abstract: A stator winding system and method includes a winding pallet on transport pallet arrangement, with the winding pallet holding the stator and being removed from the transport pallet for a winding operation.
    Type: Application
    Filed: August 22, 2001
    Publication date: July 3, 2003
    Inventors: Christopher R. Spejna, Taggert McGough, David E. Clark
  • Patent number: 6534754
    Abstract: The invention discloses a microwave off-gas system in which microwave energy is used to treat gaseous waste. A treatment chamber is used to remediate off-gases from an emission source by passing the off-gases through a susceptor matrix, the matrix being exposed to microwave radiation. The microwave radiation and elevated temperatures within the combustion chamber provide for significant reductions in the qualitative and quantitative emissions of the gas waste stream.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: March 18, 2003
    Assignee: Westinghouse Savannah River Company, L.L.C.
    Inventors: Rebecca L. Schulz, David E. Clark, George G. Wicks
  • Publication number: 20030038652
    Abstract: An electric motor component testing system includes test stations located along different conveyor lanes.
    Type: Application
    Filed: August 22, 2001
    Publication date: February 27, 2003
    Inventors: Taggert McGough, David E. Clark
  • Patent number: 6420457
    Abstract: A process and resulting product is provided in which a vulcanized solid particulate, such as vulcanized crumb rubber, has select chemical bonds broken by microwave radiation. The direct application of microwaves in combination with uniform heating of the crumb rubber renders the treated crumb rubber more suitable for use in new rubber formulations. As a result, larger particle sizes and/or loading levels of the treated crumb rubber can be used in new rubber mixtures to produce recycled composite products with good properties.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: July 16, 2002
    Assignee: Westinghouse Savannah River Company, LLC
    Inventors: George G. Wicks, Rebecca L. Schulz, David E. Clark, Diane C. Folz
  • Patent number: 6262405
    Abstract: The invention discloses a tandem microwave system consisting of a primary chamber in which hybrid microwave energy is used for the controlled combustion of materials. A second chamber is used to further treat the off-gases from the primary chamber by passage through a susceptor matrix subjected to additional hybrid microwave energy. The direct microwave radiation and elevated temperatures provide for significant reductions in the qualitative and quantitative emissions of the treated off gases. The tandem microwave system can be utilized for disinfecting wastes, sterilizing materials, and/or modifying the form of wastes to solidify organic or inorganic materials. The simple design allows on-site treatment of waste by small volume waste generators.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: July 17, 2001
    Assignee: Westinghouse Savannah River Company
    Inventors: George G. Wicks, Rebecca L. Schulz, David E. Clark
  • Publication number: 20010003338
    Abstract: The invention discloses a microwave off-gas system in which microwave energy is used to treat gaseous waste. A treatment chamber is used to remediate off-gases from an emission source by passing the off-gases through a susceptor matrix, the matrix being exposed to microwave radiation. The microwave radiation and elevated temperatures within the combustion chamber provide for significant reductions in the qualitative and quantitative emissions of the gas waste stream.
    Type: Application
    Filed: December 11, 2000
    Publication date: June 14, 2001
    Inventors: Rebecca L. Schulz, David E. Clark, George G. Wicks
  • Patent number: 6143139
    Abstract: A method for recovering metals from metals-containing wastes, and vitrifying the remainder of the wastes for disposal. Metals-containing wastes such as circuit boards, cathode ray tubes, vacuum tubes, transistors and so forth, are broken up and placed in a suitable container. The container is heated by microwaves to a first temperature in the range of approximately 300-800.degree. C. to combust organic materials in the waste, then heated further to a second temperature in the range of approximately 1,000-1,550.degree. C. at which temperature glass formers present in the waste will cause it to melt and vitrify. Low-melting-point metals such as tin and aluminum can be recovered after organics combustion is substantially complete. Metals with higher melting points, such as gold, silver and copper, can be recovered from the solidified product or separated from the waste at their respective melting points. Network former-containing materials can be added at the start of the process to assist vitrification.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: November 7, 2000
    Assignees: The United States of America as represented by the United States Department of Energy, University of Florida
    Inventors: George G. Wicks, David E. Clark, Rebecca L. Schulz
  • Patent number: 5968400
    Abstract: The invention discloses a tandem microwave system consisting of a primary chamber in which microwave energy is used for the controlled combustion of materials. A second chamber is used to further treat the off-gases from the primary chamber by passage through a susceptor matrix subjected to additional microwave energy. The direct microwave radiation and elevated temperatures provide for significant reductions in the qualitative and quantitative emissions of the treated off gases. The tandem microwave system can be utilized for disinfecting wastes, sterilizing materials, and/or modifying the form of wastes to solidify organic or inorganic materials. The simple design allows on-site treatment of waste by small volume waste generators.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: October 19, 1999
    Assignee: Westinghouse Savannah River Company
    Inventors: George G. Wicks, David E. Clark, Rebecca L. Schulz
  • Patent number: 5843287
    Abstract: A method for recovering metals from metals-containing wastes, and vitrifying the remainder of the wastes for disposal. Metals-containing wastes such as circuit boards, cathode ray tubes, vacuum tubes, transistors and so forth, are broken up and placed in a suitable container. The container is heated by microwaves to a first temperature in the range of approximately 300.degree.-800.degree. C. to combust organic materials in the waste, then heated further to a second temperature in the range of approximately 1,000.degree.-1,550.degree. C. at which temperature glass formers present in the waste will cause it to melt and vitrify. Low-melting-point metals such as tin and aluminum can be recovered after organics combustion is substantially complete. Metals with higher melting points, such as gold, silver and copper, can be recovered from the solidified product or separated from the waste at their respective melting points.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: December 1, 1998
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: George G. Wicks, David E. Clark, Rebecca L. Schulz
  • Patent number: 5658860
    Abstract: A well fluid emusion having a water phase and an oil phase of a sulfurized alcohol and a naturally occuring fat, oil or derivatives thereof. Also disclosed is a method of lubricating drilling equipment used in conjunction with the drilling, completion or workover of a subterranean well. The method includes introducing the above emulsified well fluid into the well for circulation through and out of the well, and further includes contacting the surface of the drilling equipment with the emulsified well fluid to provide an interface between the equipment surface and the water phase. Suitable naturally occurring fats and oils may be obtained from the following animal oils and fats: butter, lard, tallow, grease, herring, menhaden, pilchard and sardine; and from the following vegetable oils and fats: castor, coconut, coffee, corn, cottonseed, jojoba, linseed, liticica, olive, palm, palm kernel, peanut, rapeseed, safflower, soya, sunflower, tall and tung.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 19, 1997
    Assignee: Baker Hughes Incorporated
    Inventors: David E. Clark, William M. Dye
  • Patent number: 5586608
    Abstract: A method of making a well fluid for use in a well which includes the steps of determining uphole and downhole operating temperatures in the well, and then contacting a well lubricant with a lubricating additive, wherein the lubricating additive has a cloud point temperature greater than the uphole operating temperature and less than the downhole operating temperature. A method of lubricating drilling equipment during opeation of a subterranean well, includes the steps of determining uphole and downhole operating temperatures in the well, and then contacting the drilling equipment with a treating fluid comprising a well lubricant and a lubricating additive, with the lubricating additive having a cloud point temperature greater than the uphole operating temperature and less than the downhole operating temperature.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 24, 1996
    Assignee: Baker Hughes Incorporated
    Inventors: David E. Clark, William M. Dye
  • Patent number: 5160455
    Abstract: A method of preparing a composite of a metal oxide matrix with reinforcement particles distributed therein in gel form, by preparing a sol of a metal oxide of Al.sub.2 O.sub.3, SiO.sub.2, MgO, ZrO.sub.2, Y.sub.2 O.sub.3 and mixtures thereof, bringing the sol near the point of gelation, adding reinforcement material consisting of Al.sub.2 O.sub.3, SiC, SiO.sub.2, MgO, ZrO.sub.2, Y.sub.2 O.sub.3 and mixtures thereof in particulate form in an amount from about 5% by volume to about 90% by volume, and adding a control gelling agent in the form of an aqueous solution of a metal salt consisting of aluminum nitrate, magnesium nitrate, zirconium nitrate, chromium nitrate, silicon nitrate, neodymium nitrate and mixtures thereof in an amount corresponding to from about 1% to about 5% by weight of the metal salt based on the metal oxide in the sol to promote controlled gelation.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: November 3, 1992
    Assignee: University of Florida
    Inventors: David E. Clark, Kenneth W. Wistrom
  • Patent number: 5151075
    Abstract: A carton folding apparatus which is characterized by multiple folder/gluer modules, including a feed module for receiving and delivering unfolded cartons, prefold/fold, fold and final fold modules for effecting specified folding and gluing operations, a delivery module for completing the folding operations and further including a stacker unit for receiving and stacking the folded and glued cartons. Each of the folder/gluer modules is capable of being removed from the apparatus line and is characterized by separate, independently driven upper and lower belt feed mechanisms for driving the cartons through that module.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: September 29, 1992
    Assignee: J & L Industries, Inc.
    Inventors: Norman R. Beaulleu, David E. Clark, Arthur B. Clingman, III, Richard F. Jeffrey, James A. Mahlum, Larry E. Reeves
  • Patent number: 5077268
    Abstract: A process for producing a superconducting ceramic material using microwave energy and the superconducting ceramic material produced thereby. A preferred process comprises the steps of mixing powders of Y.sub.2 O.sub.3, CuO and at least one member selected from the group consisting of BaCO.sub.3 and BaO, and then subjecting the resultant powder mixture to heat treatment in microwave energy. In a preferred embodiment, the heat treatment step comprises the steps of calcining, sintering and annealing, at least one of the calcining and annealing steps using microwave energy.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: December 31, 1991
    Assignee: University of Florida
    Inventors: David E. Clark, Iftikhar Ahmad, Gregory T. Chandler
  • Patent number: 4978410
    Abstract: A method of repairing a defect in or joining fired or unfired ceramic bodies by using a paste composed of a wet undried metal oxide gel consisting of Al.sub.2 O.sub.3, SiO.sub.2, MgO, ZrO.sub.2, Y.sub.2 O.sub.3, and mixtures thereof and joining the paste. A reinforcement material consisting of SiC, C, SiO.sub.2, Al.sub.2 O.sub.3, ZrO.sub.2, Y.sub.2 O.sub.3, MgO and mixtures thereof may be included in the paste.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: December 18, 1990
    Assignee: University of Florida
    Inventors: David E. Clark, Robert H. Krabill
  • Patent number: 4921731
    Abstract: A method of ceramic coating a substrate by thermodeposition from a sol made by hydrolyzing and peptizing organometallic compounds in water. The sol contains colloidal particles having a size between about 0.0005 micron and about 10 microns and the deposited coatings have good packing characteristics as well as smoothness. Composite coatings are also deposited which contain reinforcing materials such as SiC embedded in the coated matrix. These coatings afford the substrate onto which they are coated excellent wear, anti-corrosion and insulating characteristics.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: May 1, 1990
    Assignee: University of Florida
    Inventors: David E. Clark, William J. Dalzell, Jr., Brenda L. Adams