Patents by Inventor Junhua Wei
Junhua Wei 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: 11958747Abstract: Disclosed are methods and systems of providing carbon nanotubes decorated with polymer coated metal nanoparticles. Then, annealing the metal coated carbon nanotubes to reduce a quantity of hydrophilic components of the polymer coating.Type: GrantFiled: April 20, 2021Date of Patent: April 16, 2024Assignees: SRI INTERNATIONAL, UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NASA, BAY SYSTEMS CONSULTING, INC.Inventors: Gabriel Iftime, Beomseok Kim, Clinton J. Smith, Eric D. Cocker, Junhua Wei, David Eric Schwartz, Meyya Meyyappan, Rahul Pandey, Yong Zhang
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Publication number: 20240092985Abstract: A composition of matter includes a solid resin powder containing one or more polymer precursors in a range of 80-99.99 wt % polymer precursor and the thermal initiator in a range of 0.001 to 20 wt % of thermal initiator. A composition of matter includes a solid resin powder containing polymer precursors comprising two components in a combination and a thermal intiator, wherein the combination comprises one of a solid epoxy with one of solid amine or anhydride, a powder resin containing both epoxy and one of either amine or anhydride, or two powder resins wherein one contains epoxy and one contains one of either amine or anhydride.Type: ApplicationFiled: November 28, 2023Publication date: March 21, 2024Inventors: JUNHUA WEI, GABRIEL IFTIME, MICHAEL BENEDICT, MAHATI CHINTAPALLI
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Patent number: 11905387Abstract: A method of producing functionalized graphene oxide includes mixing graphene oxide with a reactive monomer containing at least one epoxy functional group and a secondary functional group that is selected from vinyl, acrylate, methacrylate, and epoxy to form a mixture, adding an activation agent, heating and stirring the mixture, cooling the mixture, separating the particles from the mixture, and drying the particles to produce functionalized graphene oxide.Type: GrantFiled: December 1, 2020Date of Patent: February 20, 2024Assignee: XEROX CORPORATIONInventors: Junhua Wei, Gabriel Iftime, David Mathew Johnson, Jessica Louis Baker Rivest
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Patent number: 11905411Abstract: A composition of matter includes macroparticles comprising particles of one or more continuous phase matrix materials and functionalized microparticles contained at least partially in the one or more matrix material. A method of manufacturing includes producing macroparticles comprising a continuous phase thermoset matrix material mixed with a thermal initiator, depositing a layer of the matrix material onto a powder bed, applying a focused heat source to the layer of matrix material to selectively cure portions of the layer, repeating the depositing and applying until a final shape is formed, and removing uncured powder from the final shape.Type: GrantFiled: January 25, 2021Date of Patent: February 20, 2024Assignee: XEROX CORPORATIONInventors: Michael Benedict, Junhua Wei, Gabriel Iftime
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Publication number: 20240009934Abstract: An embodiment of the present disclosure is directed to a method of additive manufacturing. The method comprises: i) forming a first layer, the first layer comprising at least one material chosen from an article material, a support structure material and a fracturable material; ii) forming an additional layer on the first layer, the additional layer comprising at least one material chosen from the article material, the support structure material and the fracturable material; and iii) repeating ii) one or more times to form a three-dimensional build comprising an article and at least one support structure attached to the article at an interface, the interface comprising the fracturable material formed during one or more of i), ii) or iii), the fracturable material comprising a polymer. A three-dimensional build is also disclosed.Type: ApplicationFiled: July 7, 2022Publication date: January 11, 2024Applicant: XEROX CORPORATIONInventors: Junhua Wei, Daniel Bullard, Gabriel Iftime
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Publication number: 20240009935Abstract: An embodiment of the present disclosure is directed to a method of additive manufacturing. The method comprises: i) forming a first layer, the first layer comprising at least one material chosen from an article material, a support structure material and a fracturable material; ii) forming an additional layer on the first layer, the additional layer comprising at least one material chosen from the article material, the support structure material and the fracturable material; and iii) repeating ii) one or more times to form a three-dimensional build comprising an article and at least one support structure attached to the article at an interface, the interface comprising the fracturable material formed during one or more of i), ii) or iii), the fracturable material comprising a salt. A three-dimensional build is also disclosed.Type: ApplicationFiled: July 7, 2022Publication date: January 11, 2024Applicant: XEROX CORPORATIONInventors: Gabriel Iftime, Daniel Bullard, Junhua Wei
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Patent number: 11866559Abstract: A method of manufacturing includes producing a powder resin comprising a polymer precursor and a thermal initiator, packing a fiber structure with the powder resin, resulting in a resin-packed structure, and heating the resin-packed structure to a curing temperature high enough to melt and cure the resin-packed structure to form a final structure.Type: GrantFiled: January 12, 2021Date of Patent: January 9, 2024Assignee: XEROX CORPORATIONInventors: Junhua Wei, Gabriel Iftime, Michael Benedict, Mahati Chintapalli
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Patent number: 11787987Abstract: A pair of bonded substrates having a first substrate of a first material, a second substrate of the first material, and an adhesive bonding the first substrate to the second substrate, wherein the adhesive has chemically linked compatibilizing particles compatible with the first and second substrates. A composition of matter has an adhesive having a chemically linked particle network forming a bond between a first substrate and a second substrate, wherein compatibilizing particles in the particle network are compatible with the first and second substrates. A method of joining two structures of identical materials includes preparing first and second structures to expose bare material, applying an adhesive to the bare material on the first and second structures, the adhesive containing compatibilizing particles compatible with the material and the preparing allows interaction between the material and the compatibilizing particles, and curing the adhesive.Type: GrantFiled: July 23, 2018Date of Patent: October 17, 2023Assignee: XEROX CORPORATIONInventors: Gabriel Iftime, Jessica Louis Baker Rivest, David Mathew Johnson, Junhua Wei, Eugene Shin Ming Beh
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Patent number: 11781027Abstract: A composition of matter comprises at least 10 wt % epoxy functionalized two-dimensional shaped particles, carbon nanotubes in the range of 0.1 to 5 wt %, epoxy resin and a curing agent. A method of manufacturing a composition of matter includes mixing epoxy resin, carbon nanotubes and a solvent to produce a material, drying the material, and mixing the material with a curing agent to product the composition of matter. A method of printing a composition of matter includes producing the composition of matter by combining epoxy functionalized graphene, carbon nanotubes, epoxy base resin, and a curing agent, extrusion printing the composition of matter into a desired pattern, and curing the pattern.Type: GrantFiled: June 7, 2021Date of Patent: October 10, 2023Assignee: XEROX CORPORATIONInventors: Rahul Pandey, Junhua Wei, Gabriel Iftime, Jamie Kalb
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Patent number: 11701822Abstract: A method of three-dimensional manufacturing including depositing a layer of powder in a powder bed, the layer comprising particles of at least a first component of a two-component reactive material, dispensing a first solution containing at least one of a solvent and a second component of the two-component reactive material the solvent selected to cause the two components to form one or more cross-linked regions of a three-dimensional object, iterating the depositing and dispensing to form subsequent layers of the three-dimensional object until the object is formed, and removing any unwanted particles from the object. A three-dimensional manufacturing system has a powder bed to hold layers of particles, and one or more print heads positioned to dispense liquid onto the powder bed to cause the particles for form one or more cross-linked regions in layers of a solid object.Type: GrantFiled: May 17, 2021Date of Patent: July 18, 2023Assignee: Palo Alto Research Center IncorporatedInventors: Michael Benedict, Junhua Wei, Gabriel Iftime
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Publication number: 20230069939Abstract: A method includes adding particles to an alkaline solution, stirring the solution to cause the particles to acquire hydroxyl groups producing activated particles, dispersing the activated particles into a solvent solution, adding acetylene benzoxazine into the solvent solution, mixing the solvent solution, removing the solvent from the solvent solution to produce acetylene-benzoxazine functionalized particles, and drying the acetylene-benzoxazine functionalized particles. A composition of matter has acetylene-benzoxazine functionalized particles dispersed in a resin.Type: ApplicationFiled: June 30, 2022Publication date: March 9, 2023Inventors: Gabriel Iftime, Junhua Wei, Mahati Chintapalli
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Publication number: 20230021181Abstract: A method of forming a porous structure involves mixing a solvent with a curable material which disperses in the solvent such that the mixture has greater than 50% solvent content. The mixture is deposited on a substrate and viscosity of the mixture is increased. The curable material in the mixture is cured while a shape of the curable material is maintained by the solvent. After curing, the solvent is removed from the structure.Type: ApplicationFiled: September 23, 2022Publication date: January 19, 2023Inventors: Junhua Wei, Gabriel Iftime, Jessica Louis Baker Rivest, Anne Plochowietz
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Publication number: 20220389247Abstract: A composition of matter comprises at least 10 wt % epoxy functionalized two-dimensional shaped particles, carbon nanotubes in the range of 0.1 to 5 wt %, epoxy resin and a curing agent. A method of manufacturing a composition of matter includes mixing epoxy resin, carbon nanotubes and a solvent to produce a material, drying the material, and mixing the material with a curing agent to product the composition of matter. A method of printing a composition of matter includes producing the composition of matter by combining epoxy functionalized graphene, carbon nanotubes, epoxy base resin, and a curing agent, extrusion printing the composition of matter into a desired pattern, and curing the pattern.Type: ApplicationFiled: June 7, 2021Publication date: December 8, 2022Inventors: Rahul Pandey, Junhua Wei, Gabriel Iftime, Jamie Kalb
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Publication number: 20220362990Abstract: A method of three-dimensional manufacturing including depositing a layer of powder in a powder bed, the layer comprising particles of at least a first component of a two-component reactive material, dispensing a first solution containing at least one of a solvent and a second component of the two-component reactive material the solvent selected to cause the two components to form one or more cross-linked regions of a three-dimensional object, iterating the depositing and dispensing to form subsequent layers of the three-dimensional object until the object is formed, and removing any unwanted particles from the object. A three-dimensional manufacturing system has a powder bed to hold layers of particles, and one or more print heads positioned to dispense liquid onto the powder bed to cause the particles for form one or more cross-linked regions in layers of a solid object.Type: ApplicationFiled: May 17, 2021Publication date: November 17, 2022Inventors: Michael Benedict, Junhua Wei, Gabriel Iftime
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Patent number: 11485066Abstract: A method of forming a porous structure involves mixing a solvent with a curable material which disperses in the solvent such that the mixture has greater than 50% solvent content. The mixture is deposited on a substrate and viscosity of the mixture is increased. The curable material in the mixture is cured while a shape of the curable material is maintained by the solvent. After curing, the solvent is removed from the structure.Type: GrantFiled: December 17, 2018Date of Patent: November 1, 2022Assignee: Palo Alto Research Center IncorporatedInventors: Junhua Wei, Gabriel Iftime, Jessica Louis Baker Rivest, Anne Plochowietz
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Publication number: 20220315493Abstract: A ceramic matrix composite has fibers, a ceramic matrix bonded to the fibers, and ceramic particles, distributed throughout the matrix. A method includes mixing a high char ceramic resin precursor with ceramic particles, adding a catalyst to create a mixture, heating the mixture to produce functionalized ceramic particles, and cooling the mixture to produce a resin having functionalized particles.Type: ApplicationFiled: January 24, 2022Publication date: October 6, 2022Inventors: Junhua Wei, Gabriel Iftime, Jerome Unidad, Rahul Pandey, Mahati Chintapalli
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Publication number: 20220315875Abstract: Microorganisms present within a plurality of microorganism clusters immobilized in a porous support material may collectively define a supported bio-catalyst. When the microorganisms are effective to convert methane into one or more oxidized carbon compounds (e.g., methanotrophic bacteria), the supported bio-catalysts may be utilized to remove methane from methane-containing gas streams, such as those obtained from mining ventilation. Methods for processing a methane-containing gas stream may comprise interacting the gas stream with the supported bio-catalyst in substantial absence of a liquid phase, and obtaining a methane-depleted gas stream downstream from the supported bio-catalyst. Systems for processing a methane-containing gas stream may comprise the supported bio-catalysts housed in one or more vessels fluidly coupled to a source of methane-containing gas stream.Type: ApplicationFiled: December 20, 2021Publication date: October 6, 2022Applicant: Palo Alto Research Center IncorporatedInventors: Jerome UNIDAD, Eric COCKER, Joerg MARTINI, Gabriel IFTIME, Junhua WEI
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Publication number: 20220297374Abstract: A structure includes a plurality of elongated members flexibly coupled together. The flexible coupling between the elongated members allows the structure to transition between a first and second outer shape. Each of the elongated members has embedded ferromagnetic particles aligned to cause the respective elongated member to move in a predetermined deflection relative to each other in response to an applied magnetic field. The predetermined deflections cause the elongated members to collectively move the structure between the first and second outer shapes. An enclosure is coupled to the structure.Type: ApplicationFiled: March 22, 2021Publication date: September 22, 2022Inventors: Kathryn F. Murphy, Junhua Wei, Jerome Unidad
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Patent number: 11446864Abstract: Additive manufacturing compositions and methods for fabricating a conductive article with the same are provided. The additive manufacturing composition may include a 3D printable material and a metal precursor disposed in the 3D printable material. The metal precursor may include a metal salt, a metal particle, or combinations thereof. The method may include forming a first layer of the article on a substrate, where the first layer includes the additive manufacturing composition, forming a second layer of the article adjacent the first layer, and binding the first layer with the second layer to fabricate the article. The method may also include plating a metal on at least a portion of the article to fabricate the conductive article.Type: GrantFiled: March 11, 2020Date of Patent: September 20, 2022Assignee: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Junhua Wei, Anne Plochowietz, Kent Evans, Sean E. Doris
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Publication number: 20220235224Abstract: A composition of matter includes macroparticles comprising particles of one or more continuous phase matrix materials and functionalized microparticles contained at least partially in the one or more matrix material. A method of manufacturing includes producing macroparticles comprising a continuous phase thermoset matrix material mixed with a thermal initiator, depositing a layer of the matrix material onto a powder bed, applying a focused heat source to the layer of matrix material to selectively cure portions of the layer, repeating the depositing and applying until a final shape is formed, and removing uncured powder from the final shape.Type: ApplicationFiled: January 25, 2021Publication date: July 28, 2022Inventors: Michael Benedict, Junhua Wei, Gabriel Iftime