Patents by Inventor Huawen Li
Huawen Li 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: 8641926Abstract: Devices are provided comprising conductive or semiconductive layers comprising compositions comprising aqueous dispersions of polythiophenes having homopolymers or co-polymers of Formula I(a) or Formula I(b) and at least one colloid-forming polymeric acid. Methods of making such compositions and using them in organic electronic devices are further provided.Type: GrantFiled: May 13, 2008Date of Patent: February 4, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Che Hsiung Hsu, Yong Cao, Sunghan Kim, Daniel David Lecloux, Huawen Li, Charles Douglas Macpherson, Chi Zhang, Hjalti Skulason
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Patent number: 7731867Abstract: The invention is directed to conductive polymer compositions, catalytic ink compositions (e.g., for use in screen-printing), electrodes produced by deposition of an ink composition, as well as methods of making, and methods of using such compositions and electrodes. An exemplary ink material comprises a metal catalyst (e.g., platinum black and/or platinum-on-carbon), graphite as a conducting material, a polymer binding material, and an organic solvent. In one aspect, the polymer binding material comprises a polymer binder blend comprising first and second polymers, wherein the first polymer has a glass transition temperature higher than the second polymer. In a second aspect, the polymer binding material comprises a hydrophilic acrylic polymer, copolymer, or terpolymer. The conductive polymer compositions of the present invention may be used, for example, to make electrochemical sensors. Such sensors may be used, for example, in a variety of devices to monitor analyte amount or concentrations in subjects.Type: GrantFiled: January 23, 2007Date of Patent: June 8, 2010Assignee: Animas Technologies, LLCInventors: Huawen Li, Michael J. Tierney
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Publication number: 20080248314Abstract: Devices are provided comprising conductive or semiconductive layers comprising compositions comprising aqueous dispersions of polythiophenes having homopolymers or co-polymers of Formula I(a) or Formula I(b) and at least one colloid-forming polymeric acid. Methods of making such compositions and using them in organic electronic devices are further provided.Type: ApplicationFiled: May 13, 2008Publication date: October 9, 2008Inventors: Che-Hsiung Hsu, Yong Cao, SungHan Kim, Daniel David Lecloux, Huawen Li, Charles Douglas Macpherson, Chi Zhang, Hjalti Skulason
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Patent number: 7390438Abstract: Compositions are provided comprising aqueous dispersions of polythiophenes having homopolymers or co-polymers of Formula I(a) or Formula I(b) and at least one colloid-forming polymeric acid. Methods of making such compositions and using them in organic electronic devices are further provided.Type: GrantFiled: March 17, 2004Date of Patent: June 24, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Che-Hsiung Hsu, Yong Cao, Sunghan Kim, Daniel David Lecloux, Huawen Li, Charles Douglas MacPherson, Chi Zhang, Hjalti Skulason
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Publication number: 20070170402Abstract: The invention is directed to conductive polymer compositions, catalytic ink compositions (e.g., for use in screen-printing), electrodes produced by deposition of an ink composition, as well as methods of making, and methods of using such compositions and electrodes. An exemplary ink material comprises a metal catalyst (e.g., platinum black and/or platinum-on-carbon), graphite as a conducting material, a polymer binding material, and an organic solvent. In one aspect, the polymer binding material comprises a polymer binder blend comprising first and second polymers, wherein the first polymer has a glass transition temperature higher than the second polymer. In a second aspect, the polymer binding material comprises a hydrophilic acrylic polymer, copolymer, or terpolymer. The conductive polymer compositions of the present invention may be used, for example, to make electrochemical sensors. Such sensors may be used, for example, in a variety of devices to monitor analyte amount or concentrations in subjects.Type: ApplicationFiled: January 23, 2007Publication date: July 26, 2007Inventors: Huawen Li, Michael Tierney
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Patent number: 7189341Abstract: The invention is directed to conductive polymer compositions, catalytic ink compositions (e.g., for use in screen-printing), electrodes produced by deposition of an ink composition, as well as methods of making, and methods of using such compositions and electrodes. An exemplary ink material comprises a metal catalyst (e.g., platinum black and/or platinum-on-carbon), graphite as a conducting material, a polymer binding material, and an organic solvent. In one aspect, the polymer binding material comprises a polymer binder blend comprising first and second polymers, wherein the first polymer has a glass transition temperature higher than the second polymer. In a second aspect, the polymer binding material comprises a hydrophilic acrylic polymer, copolymer, or terpolymer. The conductive polymer compositions of the present invention may be used, for example, to make electrochemical sensors. Such sensors may be used, for example, in a variety of devices to monitor analyte amount or concentrations in subjects.Type: GrantFiled: October 24, 2003Date of Patent: March 13, 2007Assignee: Animas Technologies, LLCInventors: Huawen Li, Michael J. Tierney
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Publication number: 20050036020Abstract: The invention is directed to conductive polymer compositions, catalytic ink compositions (e.g., for use in screen-printing), electrodes produced by deposition of an ink composition, as well as methods of making, and methods of using such compositions and electrodes. An exemplary ink material comprises a metal catalyst (e.g., platinum black and/or platinum-on-carbon), graphite as a conducting material, a polymer binding material, and an organic solvent. In one aspect, the polymer binding material comprises a polymer binder blend comprising first and second polymers, wherein the first polymer has a glass transition temperature higher than the second polymer. In a second aspect, the polymer binding material comprises a hydrophilic acrylic polymer, copolymer, or terpolymer. The conductive polymer compositions of the present invention may be used, for example, to make electrochemical sensors. Such sensors may be used, for example, in a variety of devices to monitor analyte amount or concentrations in subjects.Type: ApplicationFiled: October 24, 2003Publication date: February 17, 2005Inventors: Huawen Li, Michael Tierney
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Publication number: 20040254297Abstract: Compositions are provided comprising aqueous dispersions of polythiophenes having homopolymers or co-polymers of Formula I(a) or Formula I(b) and at least one colloid-forming polymeric acid. Methods of making such compositions and using them in organic electronic devices are further provided.Type: ApplicationFiled: March 17, 2004Publication date: December 16, 2004Inventors: Che-Hsiung Hsu, Yong Cao, Sunghan Kim, Daniel David Lecloux, Huawen Li, Charles Douglas MacPherson, Chi Zhang, Hjalti Skulason
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Patent number: 6436541Abstract: This invention relates to a two layers or more anti-static film coating deposited on a substrate. Selected layers of the films may have anti-static and/or electromagnetic properties. In one embodiment, the film farthest from the substrate has an index of refraction lower than the underlying film. In another embodiment, the surface of the film is roughened to provide a graded index of refraction.Type: GrantFiled: April 7, 1999Date of Patent: August 20, 2002Assignee: PPG Industries Ohio, Inc.Inventors: John F. Sopko, Michael O. Okoroafor, Huawen Li, George A. Neuman
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Publication number: 20010031811Abstract: Describes durable coating compositions and a process for the preparation of durable, broad-band antireflective coatings on organic polymeric host materials and photochromic organic polymeric host materials. The coating compositions consist essentially of a silane monomer mixture comprising glycidoxyalkylalkoxysilane and alkylalkoxysilane(s) with or without tetraalkoxysilanes; water-soluble organic polymer; a leveling amount of nonionic surfactant; a solvating amount of lower aliphatic alcohol; a catalytic amount of water-soluble acid; and water. The coating compositions may optionally contain fluorinated silane(s). Also describes a process for preparing antireflective coatings comprising the steps of coating a polymeric host material with the durable coating composition; curing the coating; treating the cured coating with an aqueous acidic solution to produce a graded refractive index; removing residual acid; and further curing the coating.Type: ApplicationFiled: February 28, 2001Publication date: October 18, 2001Inventors: Huawen Li, Bhima R. Vijayendran
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Patent number: 6265049Abstract: The presence of substantially water-insoluble plasticizer in the binder of a coating of an inkjet printing medium serves to reduce curl. The preferred substantially water-insoluble plasticizer is butyl benzyl phthalate.Type: GrantFiled: May 25, 1999Date of Patent: July 24, 2001Assignee: Hewlett-Packard CompanyInventors: Robert G. Swisher, Huawen Li
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Patent number: 6183844Abstract: A printing medium suitable for inkjet printing comprises a substrate having at least two water-absorptive coatings applied sequentially. Each of the two water-absorptive coatings comprises hydrophilic organic polymer and small discrete nonfilm-forming particles. The hydrophilic organic polymer of the interior water-absorptive coating adjacent the exterior water-absorptive coating contains a greater quantity of nitrogen-containing substance than the hydrophilic organic polymer of the exterior water-absorptive coating. “Nitrogen-containing substance” is defined as being independently selected from the group consisting of quaternary ammonium mer units, poly(N-vinylpyrrolidinone), copolymer of N-vinylpyrrolidinone and &agr;-(meth)acrylyloxy-&ohgr;-(hydroxy, methoxy, or ethoxy)-poly(ethylene oxide), and two or more thereof.Type: GrantFiled: December 16, 1998Date of Patent: February 6, 2001Assignee: Hewlett-Packard CompanyInventor: Huawen Li
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Patent number: 5998534Abstract: Water-soluble or water-dispersible addition copolymer of ethylenically unsaturated monomers, wherein the ethylenically unsaturated monomers comprise N-vinyl-2-pyrrolidinone and ethylenically unsaturated polyether, is useful as a component of inkjet printable coatings. The copolymer serves to reduce later migration of inks printed on the coatings.Type: GrantFiled: June 19, 1998Date of Patent: December 7, 1999Assignee: PPG Industries Ohio, Inc.Inventors: Robert H. Tang, Huawen Li, Alan E. Wang
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Patent number: 5989687Abstract: A printing medium comprising a substrate having at least one surface and a coating adhered to the surface wherein the coating comprises (a) binder comprising film-forming organic polymer, and (b) the polymerization reaction product of the hydrolyzate of an aluminum alkoxide and an organoalkoxysilane.Type: GrantFiled: December 9, 1997Date of Patent: November 23, 1999Assignee: PPG Industries Ohio, Inc.Inventor: Huawen Li
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Patent number: 5744243Abstract: Describes a composition for producing durable coatings and a process for preparing a single-layer broad band antireflective coating on solid substrates, such as glass, ceramics, metals, and organic polymeric materials. The coating composition comprises, in combination, acid catalyzed hydrolysis and condensation products of water-silane monomer mixture and a film forming amount of a polymer having functional groups selected from amino, hydroxy and carboxy, hydroxy and amino, amino and carboxy, and amino, hydroxy and carboxy. The described process comprises applying the aforesaid coating composition (or an acid catalyzed sol-gel coating composition) substantially free of preformed oxide sol and water soluble metal salt to the surface of a solid substrate, curing the applied coating, and treating the cured coating with an aqueous electrolyte solution for a time sufficient to produce a coating having graded porosity which is antireflective over a broad band of the visible spectrum.Type: GrantFiled: September 10, 1996Date of Patent: April 28, 1998Assignee: PPG Industries, Inc.Inventors: Huawen Li, Alan E. Wang, Suryya K. Das
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Patent number: 5580819Abstract: Describes a composition for producing durable coatings and a process for preparing a single-layer broad band antireflective coating on solid substrates, such as glass, ceramics, metals, and organic polymeric materials. The coating composition comprises, in combination, acid catalyzed hydrolysis and condensation products of water-silane monomer mixture and a film forming amount of a polymer having functional groups selected from amino, hydroxy and carboxy, hydroxy and amino, amino and carboxy, and amino, hydroxy and carboxy. The described process comprises applying the aforesaid coating composition (or an acid catalyzed sol-gel coating composition) substantially free of preformed oxide sol and water soluble metal salt to the surface of a solid substrate, curing the applied coating, and treating the cured coating with an aqueous electrolyte solution for a time sufficient to produce a coating having graded porosity which is antireflective over a broad band of the visible spectrum.Type: GrantFiled: March 22, 1995Date of Patent: December 3, 1996Assignee: PPG Industries, Inc.Inventors: Huawen Li, Alan E. Wang, Suryya K. Das