Patents by Inventor Vijaykumar S. Ijeri
Vijaykumar S. Ijeri 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: 11976216Abstract: An electrically conductive and corrosion resistant graphene-based coating composition, including a binder, high-pressure airless-sprayed expanded graphene stacks, carbon fibers, and a dispersing agent, wherein the graphene-based coating composition has an electrical conductivity of at least 2 S/cm and a pull-off adhesion of at least 2 MPa.Type: GrantFiled: November 5, 2021Date of Patent: May 7, 2024Assignee: THE BOEING COMPANYInventors: Vijaykumar S. Ijeri, Stephen P. Gaydos, Patrick J. Kinlen, Priyanka G. Dhirde, Anand Khanna
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Publication number: 20230392275Abstract: In certain aspects, a coated steel substrate comprises a single or multiple-layer electroplated aluminum coating over a steel substrate. The multiple-layer electroplated aluminum coating comprises one or more porous layers and one or more compact layers. The one or more porous layers comprise a material selected from a group consisting of aluminum and aluminum alloys. The one or more compact layers comprise a material selected from a group consisting of aluminum and aluminum alloys. In certain aspects, a method of depositing a multiple-layer aluminum coating over a steel substrate includes electroplating one or more porous aluminum layers over the steel substrate. The one or more porous aluminum layers comprise a material selected from a group consisting of aluminum and aluminum alloys. One or more compact aluminum layers are electroplated over the steel substrate. The one or more compact aluminum layers comprise a material selected from a group consisting of aluminum and aluminum alloys.Type: ApplicationFiled: May 8, 2023Publication date: December 7, 2023Inventors: Vijaykumar S. IJERI, Om PRAKASH, Stephen P. GAYDOS
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Patent number: 11826981Abstract: The present disclosure provides electrolyte solutions for electrodeposition of zinc-manganese alloys, methods of forming electrolyte solutions, methods of electrodepositing zinc-manganese alloys, and multilayered zinc-manganese alloys. An electrolyte solution for electroplating can include a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. An electrolyte solution can be formed by dissolving a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde in water or an aqueous solution. Electrodepositing zinc-manganese alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. Electrodepositing can further include passing a current between the cathode and the anode through the electrolyte solution to deposit zinc and manganese onto the cathode.Type: GrantFiled: March 14, 2023Date of Patent: November 28, 2023Assignee: THE BOEING COMPANYInventors: Stephen P. Gaydos, Vijaykumar S. Ijeri, Om Prakash, Shashi Kant Tiwari, Raghuvir Singh, Sharma Paswan, Lokesh C. Pathak
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Publication number: 20230357944Abstract: An electrolyte solution for iron-tungsten plating is prepared by dissolving in an aqueous medium a divalent iron salt (e.g., iron (II) sulfate) and an alkali metal citrate (e.g., sodium citrate, potassium citrate, or other alkali metal citrate) to form a first solution, dissolving in the first solution a tungstate salt (e.g., sodium tungstate, potassium tungstate, or other potassium tungstate) to form a second solution, and dissolving in the second solution a citric acid to form the electrolyte solution. An iron-tungsten coating is formed on a substrate using the electrolyte solution by passing a current between a cathode and an anode through the electrolyte solution to deposit iron and tungsten on the substrate.Type: ApplicationFiled: June 29, 2023Publication date: November 9, 2023Inventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Nitin Pandurang Wasekar, Govindan Sundararajan, Dameracharla Srinivasa Rao
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Patent number: 11773502Abstract: An electrolyte solution for iron-tungsten plating is prepared by dissolving in an aqueous medium a divalent iron salt (e.g., iron (II) sulfate) and an alkali metal citrate (e.g., sodium citrate, potassium citrate, or other alkali metal citrate) to form a first solution, dissolving in the first solution a tungstate salt (e.g., sodium tungstate, potassium tungstate, or other potassium tungstate) to form a second solution, and dissolving in the second solution a citric acid to form the electrolyte solution. An iron-tungsten coating is formed on a substrate using the electrolyte solution by passing a current between a cathode and an anode through the electrolyte solution to deposit iron and tungsten on the substrate.Type: GrantFiled: September 16, 2021Date of Patent: October 3, 2023Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Nitin Pandurang Wasekar, Govindan Sundararajan, Dameracharla Srinivasa Rao
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Publication number: 20230304182Abstract: Electrolyte solutions for electrodeposition of zinc alloys and methods of electrodepositing zinc-iron alloys. An electrolyte solution for electroplating can include an alkali metal hydroxide, a zinc salt, a condensation polymer of epichlorohydrin, a quaternary amine, an aliphatic amine, a polyhydroxy alcohol, an aromatic organic acid and/or salts thereof, an amino alcohol, a bisphosphonic acid and/or salts thereof, an iron salt, an alkali metal gluconate, and an amine-based chelating agent. Electrodepositing zinc alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising an alkali metal hydroxide, a zinc salt, a condensation polymer of epichlorohydrin, a quaternary amine, an aliphatic amine, a polyhydroxy alcohol, an aromatic organic acid and/or salts thereof, an amino alcohol, a bisphosphonic acid and/or salts thereof, an iron salt, an alkali metal gluconate, and an amine-based chelating agent.Type: ApplicationFiled: May 3, 2023Publication date: September 28, 2023Inventors: Vijaykumar S. IJERI, Stephen P. GAYDOS, Bidyut Kumar MANNA, Dibyendu CHAKRABORTY
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Patent number: 11739225Abstract: A layered tetravalent metal phosphate composition (e.g., a layered zirconium phosphate composition) and a first corrosion inhibitor (e.g., cerium (III), a vanadate, a molybdate, a tungstate, a manganous, a manganate, a permanganate, an aluminate, a phosphonate, a thiazole, a triazole, and/or an imidazole) is dispersed in an aqueous solution and stirred to form a first solution. A precipitate of the first solution is collected and washed to form a first corrosion inhibiting material (CIM), which includes the first corrosion inhibitor intercalated in the layered tetravalent metal phosphate composition. The first CIM is added to a first sol-gel composition to form a first CIM-containing sol-gel composition. The first CIM-containing sol-gel composition is applied on a substrate to form a CIM-containing sol-gel layer, cured by UV radiation, and thermally cured to form a corrosion-resistant coating. One or more additional sol-gel composition may be applied on the substrate.Type: GrantFiled: August 6, 2019Date of Patent: August 29, 2023Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy
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Patent number: 11732375Abstract: An electrolyte solution for iron-tungsten plating is prepared by dissolving in an aqueous medium a divalent iron salt (e.g., iron (II) sulfate) and an alkali metal citrate (e.g., sodium citrate, potassium citrate, or other alkali metal citrate) to form a first solution, dissolving in the first solution a tungstate salt (e.g., sodium tungstate, potassium tungstate, or other potassium tungstate) to form a second solution, and dissolving in the second solution a citric acid to form the electrolyte solution. An iron-tungsten coating is formed on a substrate using the electrolyte solution by passing a current between a cathode and an anode through the electrolyte solution to deposit iron and tungsten on the substrate.Type: GrantFiled: November 12, 2021Date of Patent: August 22, 2023Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Nitin Pandurang Wasekar, Govindan Sundararajan, Dameracharla Srinivasa Rao
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Publication number: 20230211582Abstract: The present disclosure provides electrolyte solutions for electrodeposition of zinc-manganese alloys, methods of forming electrolyte solutions, methods of electrodepositing zinc-manganese alloys, and multilayered zinc-manganese alloys. An electrolyte solution for electroplating can include a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. An electrolyte solution can be formed by dissolving a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde in water or an aqueous solution. Electrodepositing zinc-manganese alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. Electrodepositing can further include passing a current between the cathode and the anode through the electrolyte solution to deposit zinc and manganese onto the cathode.Type: ApplicationFiled: March 14, 2023Publication date: July 6, 2023Inventors: Stephen P. GAYDOS, Vijaykumar S. IJERI, Om PRAKASH, Shashi Kant TIWARI, Raghuvir SINGH, Sharma PASWAN, Lokesh C. PATHAK
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Patent number: 11661666Abstract: Electrolyte solutions for electrodeposition of zinc alloys and methods of electrodepositing zinc-iron alloys. An electrolyte solution for electroplating can include an alkali metal hydroxide, a zinc salt, a condensation polymer of epichlorohydrin, a quaternary amine, an aliphatic amine, a polyhydroxy alcohol, an aromatic organic acid and/or salts thereof, an amino alcohol, a bisphosphonic acid and/or salts thereof, an iron salt, an alkali metal gluconate, and an amine-based chelating agent. Electrodepositing zinc alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising an alkali metal hydroxide, a zinc salt, a condensation polymer of epichlorohydrin, a quaternary amine, an aliphatic amine, a polyhydroxy alcohol, an aromatic organic acid and/or salts thereof, an amino alcohol, a bisphosphonic acid and/or salts thereof, an iron salt, an alkali metal gluconate, and an amine-based chelating agent.Type: GrantFiled: October 10, 2019Date of Patent: May 30, 2023Assignee: THE BOEING COMPANYInventors: Vijaykumar S. Ijeri, Stephen P. Gaydos, Bidyut Kumar Manna, Dibyendu Chakraborty
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Patent number: 11661665Abstract: In certain aspects, a coated steel substrate comprises a single or multiple-layer electroplated aluminum coating over a steel substrate. The multiple-layer electroplated aluminum coating comprises one or more porous layers and one or more compact layers. The one or more porous layers comprise a material selected from a group consisting of aluminum and aluminum alloys. The one or more compact layers comprise a material selected from a group consisting of aluminum and aluminum alloys. In certain aspects, a method of depositing a multiple-layer aluminum coating over a steel substrate includes electroplating one or more porous aluminum layers over the steel substrate. The one or more porous aluminum layers comprise a material selected from a group consisting of aluminum and aluminum alloys. One or more compact aluminum layers are electroplated over the steel substrate. The one or more compact aluminum layers comprise a material selected from a group consisting of aluminum and aluminum alloys.Type: GrantFiled: April 30, 2020Date of Patent: May 30, 2023Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos
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Patent number: 11633940Abstract: The present disclosure provides electrolyte solutions for electrodeposition of zinc-manganese alloys, methods of forming electrolyte solutions, methods of electrodepositing zinc-manganese alloys, and multilayered zinc-manganese alloys. An electrolyte solution for electroplating can include a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. An electrolyte solution can be formed by dissolving a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde in water or an aqueous solution. Electrodepositing zinc-manganese alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. Electrodepositing can further include passing a current between the cathode and the anode through the electrolyte solution to deposit zinc and manganese onto the cathode.Type: GrantFiled: July 1, 2021Date of Patent: April 25, 2023Assignee: THE BOEING COMPANYInventors: Stephen P. Gaydos, Vijaykumar S. Ijeri, Om Prakash, Shashi Kant Tiwari, Raghuvir Singh, Sharma Paswan, Lokesh C. Pathak
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Publication number: 20220074066Abstract: An electrolyte solution for iron-tungsten plating is prepared by dissolving in an aqueous medium a divalent iron salt (e.g., iron (II) sulfate) and an alkali metal citrate (e.g., sodium citrate, potassium citrate, or other alkali metal citrate) to form a first solution, dissolving in the first solution a tungstate salt (e.g., sodium tungstate, potassium tungstate, or other potassium tungstate) to form a second solution, and dissolving in the second solution a citric acid to form the electrolyte solution. An iron-tungsten coating is formed on a substrate using the electrolyte solution by passing a current between a cathode and an anode through the electrolyte solution to deposit iron and tungsten on the substrate.Type: ApplicationFiled: November 12, 2021Publication date: March 10, 2022Inventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Nitin Pandurang Wasekar, Govindan Sundararajan, Dameracharla Srinivasa Rao
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Publication number: 20220056282Abstract: An electrically conductive and corrosion resistant graphene-based coating composition, including a binder, high-pressure airless-sprayed expanded graphene stacks, carbon fibers, and a dispersing agent, wherein the graphene-based coating composition has an electrical conductivity of at least 2 S/cm and a pull-off adhesion of at least 2 MPa.Type: ApplicationFiled: November 5, 2021Publication date: February 24, 2022Applicant: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Stephen P. Gaydos, Patrick J. Kinlen, Priyanka G. Dhirde, Anand Khanna
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Publication number: 20220002893Abstract: An electrolyte solution for iron-tungsten plating is prepared by dissolving in an aqueous medium a divalent iron salt (e.g., iron (II) sulfate) and an alkali metal citrate (e.g., sodium citrate, potassium citrate, or other alkali metal citrate) to form a first solution, dissolving in the first solution a tungstate salt (e.g., sodium tungstate, potassium tungstate, or other potassium tungstate) to form a second solution, and dissolving in the second solution a citric acid to form the electrolyte solution. An iron-tungsten coating is formed on a substrate using the electrolyte solution by passing a current between a cathode and an anode through the electrolyte solution to deposit iron and tungsten on the substrate.Type: ApplicationFiled: September 16, 2021Publication date: January 6, 2022Inventors: Vijaykumar S. IJERI, Om PRAKASH, Stephen P. GAYDOS, Nitin Pandurang WASEKAR, Govindan SUNDARARAJAN, Dameracharla Srinivasa RAO
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Patent number: 11214693Abstract: An electrically conductive and corrosion resistant graphene-based coating composition, including a binder, a graphene-filler; and a dispersing agent, wherein the graphene filler comprises a plurality of graphene stacks.Type: GrantFiled: August 9, 2019Date of Patent: January 4, 2022Assignee: THE BOEING COMPANYInventors: Vijaykumar S. Ijeri, Stephen P. Gaydos, Patrick J. Kinlen, Priyanka G. Dhirde, Anand Khanna
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Patent number: 11208731Abstract: An electrolyte solution for iron-tungsten plating is prepared by dissolving in an aqueous medium a divalent iron salt (e.g., iron (II) sulfate) and an alkali metal citrate (e.g., sodium citrate, potassium citrate, or other alkali metal citrate) to form a first solution, dissolving in the first solution a tungstate salt (e.g., sodium tungstate, potassium tungstate, or other potassium tungstate) to form a second solution, and dissolving in the second solution a citric acid to form the electrolyte solution. An iron-tungsten coating is formed on a substrate using the electrolyte solution by passing a current between a cathode and an anode through the electrolyte solution to deposit iron and tungsten on the substrate.Type: GrantFiled: June 9, 2017Date of Patent: December 28, 2021Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Nitin Pandurang Wasekar, Govindan Sundararajan, Dameracharla Srinivasa Rao
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Publication number: 20210340686Abstract: In certain aspects, a coated steel substrate comprises a single or multiple-layer electroplated aluminum coating over a steel substrate. The multiple-layer electroplated aluminum coating comprises one or more porous layers and one or more compact layers. The one or more porous layers comprise a material selected from a group consisting of aluminum and aluminum alloys. The one or more compact layers comprise a material selected from a group consisting of aluminum and aluminum alloys. In certain aspects, a method of depositing a multiple-layer aluminum coating over a steel substrate includes electroplating one or more porous aluminum layers over the steel substrate. The one or more porous aluminum layers comprise a material selected from a group consisting of aluminum and aluminum alloys. One or more compact aluminum layers are electroplated over the steel substrate. The one or more compact aluminum layers comprise a material selected from a group consisting of aluminum and aluminum alloys.Type: ApplicationFiled: April 30, 2020Publication date: November 4, 2021Inventors: Vijaykumar S. IJERI, Om PRAKASH, Stephen P. GAYDOS
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Publication number: 20210324531Abstract: The present disclosure provides electrolyte solutions for electrodeposition of zinc-manganese alloys, methods of forming electrolyte solutions, methods of electrodepositing zinc-manganese alloys, and multilayered zinc-manganese alloys. An electrolyte solution for electroplating can include a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. An electrolyte solution can be formed by dissolving a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde in water or an aqueous solution. Electrodepositing zinc-manganese alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising a metal salt, boric acid, an alkali metal chloride, polyethylene glycol, and a hydroxy benzaldehyde. Electrodepositing can further include passing a current between the cathode and the anode through the electrolyte solution to deposit zinc and manganese onto the cathode.Type: ApplicationFiled: July 1, 2021Publication date: October 21, 2021Inventors: Stephen P. GAYDOS, Vijaykumar S. IJERI, Om PRAKASH, Shashi Kant TIWARI, Raghuvir SINGH, Sharma PASWAN, Lokesh C. PATHAK
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Patent number: 11091653Abstract: An alkoxysilane is contacted with water and an inorganic acid to form a first composition. A zirconium alkoxide is contacted with an organic acid to form a second composition. One or more alkoxysilanes and an organic acid are contacted with a mixture of the first and second compositions to form a sol-gel composition, to which a photoinitiator is added. The sol-gel composition has a ratio of a number of moles of silicon to a number of moles of zirconium (nSi/nZr) ranging from about 2 to about 10. The sol-gel composition is applied on a substrate (e.g., an aluminum alloy substrate) multiple times to form multiple sol-gel layers, and at least one of the sol-gel layers is cured by UV radiation. The multiple sol-gel layers are then thermally cured.Type: GrantFiled: August 7, 2019Date of Patent: August 17, 2021Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy