Patents by Inventor Edward Langa
Edward Langa 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).
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Patent number: 10440808Abstract: A method and system for generating a surface treating plasma. Gas is provided to a power conducting electrode and flows through the power conducting electrode. Power pulses are applied to the power conducting electrode in the range of 40 kW to 100 kW with a DC generator, at a frequency in the range of 1 Hz to 62.5 kHz, and with a pulse duration in the range of 0.1 microseconds to 3,000 microseconds. Peak currents in the range of 100 Amps to 400 Amps are produced and plasma is formed from the gas. A substrate surface may then be treated with the plasma.Type: GrantFiled: November 17, 2015Date of Patent: October 8, 2019Assignee: SOUTHWEST RESEARCH INSTITUTEInventors: Vasiliki Zorbas Poenitzsch, Ronghua Wei, Kent E. Coulter, Edward Langa
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Patent number: 10354845Abstract: An atmospheric pressure pulsed arc plasma source and method of using including a housing having a housing opening therein; an insulator tube having an insulator tube opening therein, retained within the housing opening; and a conductive tube, retained within the insulator tube opening. A nozzle is retained by the housing. A feed path is defined in the conductive tube and the nozzle and a gas feed port is operatively coupled to the feed path. Feedstock is provided in the feed path and electrically coupled to the conductive tube. A pulsed DC power source provides a pulsed voltage to the conductive tube. The plasma source emits a discharge stream having a temperature that is less than 50° C. from the nozzle and a coating is formed on a substrate.Type: GrantFiled: February 18, 2016Date of Patent: July 16, 2019Assignee: SOUTHWEST RESEARCH INSTITUTEInventors: Vasiliki Zorbas Poenitzsch, Ronghua Wei, Edward Langa, Kent E. Coulter
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Publication number: 20170243727Abstract: An atmospheric pressure pulsed arc plasma source and method of using including a housing having a housing opening therein; an insulator tube having an insulator tube opening therein, retained within the housing opening; and a conductive tube, retained within the insulator tube opening. A nozzle is retained by the housing. A feed path is defined in the conductive tube and the nozzle and a gas feed port is operatively coupled to the feed path. Feedstock is provided in the feed path and electrically coupled to the conductive tube. A pulsed DC power source provides a pulsed voltage to the conductive tube. The plasma source emits a discharge stream having a temperature that is less than 50° C. from the nozzle and a coating is formed on a substrate.Type: ApplicationFiled: February 18, 2016Publication date: August 24, 2017Inventors: Vasiliki Zorbas POENITZSCH, Ronghua WEI, Edward LANGA, Kent E. COULTER
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Publication number: 20170142819Abstract: A method and system for generating a surface treating plasma. Gas is provided to a power conducting electrode and flows through the power conducting electrode. Power pulses are applied to the power conducting electrode in the range of 40 kW to 100 kW with a DC generator, at a frequency in the range of 1 Hz to 62.5 kHz, and with a pulse duration in the range of 0.1 microseconds to 3,000 microseconds. Peak currents in the range of 100 Amps to 400 Amps are produced and plasma is formed from the gas. A substrate surface may then be treated with the plasma.Type: ApplicationFiled: November 17, 2015Publication date: May 18, 2017Inventors: Vasiliki Zorbas POENITZSCH, Ronghua WEI, Kent E. COULTER, Edward LANGA
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Patent number: 8747631Abstract: The present disclosure relates to an apparatus and method utilizing double glow discharge for sputter cleaning of a selected surface. The surface may include the inner surface of a hollow substrate such as a tube which inner surface may then be coated via magnetron sputter deposition.Type: GrantFiled: March 15, 2010Date of Patent: June 10, 2014Assignee: Southwest Research InstituteInventors: Ronghua Wei, Edward Langa, Sabrina L. Lee
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Patent number: 8252388Abstract: A method of performing plasma immersion ion processing (PIIP), particularly suited for processing three-dimensional objects. One or more such objects are placed in a conductive cage having solid or mesh walls. The cage completely encloses the objects. A voltage is applied to the cage, and the plasma is generated, resulting in the plasma being contained within the cage.Type: GrantFiled: May 15, 2008Date of Patent: August 28, 2012Assignee: Southwest Research InstituteInventors: Ronghua Wei, Chris Rincon, Edward Langa
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Patent number: 8034459Abstract: The present disclosure relates to a coating and a method of applying such coating that may include nanocrystals of a transition metal compound embedded in an amorphous phase or layered structure of transition metal compounds with an amorphous phase. The transition metal compound may be selected from the group consisting of metal nitrides, metal carbides, metal silicides and combinations thereof. The amorphous matrix may include a ceramic.Type: GrantFiled: October 18, 2006Date of Patent: October 11, 2011Assignee: Southwest Research InstituteInventors: Ronghua Wei, Edward Langa, James H. Arps, Christopher Rincon
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Publication number: 20110220490Abstract: The present disclosure relates to an apparatus and method utilizing double glow discharge for sputter cleaning of a selected surface. The surface may include the inner surface of a hollow substrate such as a tube which inner surface may then be coated via magnetron sputter deposition.Type: ApplicationFiled: March 15, 2010Publication date: September 15, 2011Applicant: SOUTHWEST RESEARCH INSTITUTEInventors: Ronghua WEI, Edward LANGA, Sabrina L. LEE
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Publication number: 20110111132Abstract: A system and method for depositing coatings on an inner surface of a tubular structure includes at least one pump for creating and maintaining a vacuum in the tubular structure, a meshed electrode adapted to be positioned in a center of the tubular structure, and a biased voltage power supply connected to the meshed electrode. The biased voltage power supply is adapted to apply a negative voltage to the meshed electrode such that the negative voltage causes a hollow cathode discharge inside the meshed electrode. The creation of the hollow cathode discharge causes ions to be drawn out of a mesh on the meshed electrode and accelerate onto an inner surface of the tubular structure, thereby coating the inner surface with a desired coating.Type: ApplicationFiled: November 4, 2010Publication date: May 12, 2011Applicant: ELECTRIC POWER RESEARCH INSTITUTE, INC.Inventors: Ronghua Wei, Christopher Rincon, Edward Langa, Narayana S. Cheruvu
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Patent number: 7790003Abstract: A method for depositing a nanostructured coating comprising chromium or a copper-chromium mixture on a workpiece. The workpiece may comprise a hollowed structure such as a rocket or jet engine combustion chamber liner. The method comprises providing a magnetron and an external sputter target material comprising chromium or a copper-chromium composite and effecting a magnetron sputter deposition to deposit a substantially uniform nanostructured coating comprising said sputter target material on said workpiece. The method may include plasma enhancement wherein a filament is utilized to produce a plasma that effects an ion bombardment on the workpiece during the magnetron sputter deposition process. The invention also includes the nanostructured coatings deposited by these methods and workpieces coated thereby.Type: GrantFiled: April 4, 2006Date of Patent: September 7, 2010Assignee: Southwest Research InstituteInventors: Kuang-Tsan Kenneth Chiang, Ronghua Wei, Edward Langa
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Publication number: 20090286012Abstract: A method of performing plasma immersion ion processing (PIIP), particularly suited for processing three-dimensional objects. One or more such objects are placed in a conductive cage having solid or mesh walls. The cage completely encloses the objects. A voltage is applied to the cage, and the plasma is generated, resulting in the plasma being contained within the cage.Type: ApplicationFiled: May 15, 2008Publication date: November 19, 2009Applicant: Southwest Research InstituteInventors: Ronghua Wei, Chris Rincon, Edward Langa
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Publication number: 20090214787Abstract: The present disclosure relates to a method for producing a coating on a substrate. The method may include depositing metal atoms on one or more surfaces of a substrate, subjecting the metal atoms to a reactive gas, and producing a coating layer of a metal compound, wherein the metal compound may include nanocrystals of a transition metal compound in a ceramic matrix, wherein the transition metal compound may be selected from the group consisting of metal nitrides, metal carbides, metal silicides and combinations thereof. The reactive gas may be supplied from a precursor containing silicon, carbon and hydrogen, wherein the precursor may have a MW of greater than or equal to 100.Type: ApplicationFiled: February 24, 2009Publication date: August 27, 2009Applicant: SOUTHWEST RESEARCH INSTITUTEInventors: Ronghua WEI, Christopher RINCON, Edward LANGA
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Publication number: 20070087185Abstract: The present disclosure relates to a coating and a method of applying such coating that may include nanocrystals of a transition metal compound embedded in an amorphous phase or layered structure of transition metal compounds with an amorphous phase. The transition metal compound may be selected from the group consisting of metal nitrides, metal carbides, metal silicides and combinations thereof. The amorphous matrix may include a ceramic.Type: ApplicationFiled: October 18, 2006Publication date: April 19, 2007Applicant: SOUTHWEST RESEARCH INSTITUTEInventors: Ronghua WEI, Edward LANGA, James ARPS, Christopher RINCON
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Publication number: 20060251917Abstract: A method for depositing a nanostructured coating comprising chromium or a copper-chromium mixture on a workpiece. The workpiece may comprise a hollowed structure such as a rocket or jet engine combustion chamber liner. The method comprises providing a magnetron and an external sputter target material comprising chromium or a copper-chromium composite and effecting a magnetron sputter deposition to deposit a substantially uniform nanostructured coating comprising said sputter target material on said workpiece. The method may include plasma enhancement wherein a filament is utilized to produce a plasma that effects an ion bombardment on the workpiece during the magnetron sputter deposition process. The invention also includes the nanostructured coatings deposited by these methods and workpieces coated thereby.Type: ApplicationFiled: April 4, 2006Publication date: November 9, 2006Applicant: Southwest Research InstituteInventors: Kuang-Tsan Chiang, Ronghua Wei, Edward Langa