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: 11066752Abstract: 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: May 4, 2018Date of Patent: July 20, 2021Assignee: 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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Patent number: 11027485Abstract: A method of fabricating a part includes stacking sheets of fusible material to form a stack. The method also includes directing a laser beam through at least one sheet of the stack. The method also includes transferring energy from the laser beam to multiple locations on at least one interface between adjacent sheets of the stack, according to a predetermined pattern corresponding with a design of the part, to form corresponding multiple molten regions. The molten regions are conjoined together to form a fused portion of the adjacent sheets. The fused portion of the adjacent sheets defines the part.Type: GrantFiled: November 30, 2017Date of Patent: June 8, 2021Assignee: The Boeing CompanyInventors: Om Prakash, Nishant K. Sinha, Vijaykumar S. Ijeri
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Publication number: 20210108323Abstract: 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: October 10, 2019Publication date: April 15, 2021Inventors: Vijaykumar S. IJERI, Stephen P. Gaydos, Bidyut Kumar Manna, Dibyendu Chakraborty
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Publication number: 20210040333Abstract: 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: ApplicationFiled: August 9, 2019Publication date: February 11, 2021Applicant: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Stephen P. Gaydos, Patrick J. Kinlen, Priyanka G. Dhirde, Anand Khanna
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Publication number: 20200354847Abstract: The present disclosure provides electrolyte solutions for electrodeposition of zinc-iron alloys, methods of forming electrolyte solutions, and methods of electrodepositing zinc-iron alloys. An electrolyte solution for electroplating can include an alkali metal citrate, an alkali metal acetate, a citric acid, and glycine with a metal salt. An electrolyte solution can be formed by dissolving an alkali metal citrate, an alkali metal acetate, a citric acid, and glycine in water or an aqueous solution. Electrodepositing zinc-iron alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising an alkali metal citrate, an alkali metal acetate, a citric acid, and glycine. Electrodepositing can further include passing a current between the cathode and the anode through the electrolyte solution to deposit zinc and iron onto the cathode.Type: ApplicationFiled: July 28, 2020Publication date: November 12, 2020Inventors: Stephen P. GAYDOS, Vijaykumar S. IJERI, Om PRAKASH, Trilochan MISHRA, Raghuvir SINGH, Shashi Kant TIWARI
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Patent number: 10793725Abstract: A Zn—Al layered double hydroxide (LDH) composition is added to a solution including a corrosion inhibitor and stirred, and a precipitate of the solution is collected, washed, and dried to form a corrosion inhibiting material (CIM), in which the LDH composition is intercalated with the corrosion inhibitor. An inorganic CIM and/or an organic CIM may be formed. The organic CIM may be added to a sol-gel composition to form an organic CIM-containing sol-gel composition, and the inorganic CIM may be added to a sol-gel composition to form an inorganic CIM-containing sol-gel composition. Further, the organic CIM-containing sol-gel composition may be applied on a substrate (e.g., an aluminum alloy substrate) to form an organic CIM-containing sol-gel layer and cured by ultraviolet (UV) radiation, the inorganic CIM-containing sol-gel composition may be applied on the substrate to form an inorganic CIM-containing sol-gel layer and cured by UV radiation, and the sol-gel layers may be thermally cured.Type: GrantFiled: March 15, 2019Date of Patent: October 6, 2020Assignee: 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: 10767274Abstract: The present disclosure provides electrolyte solutions for electrodeposition of zinc-iron alloys, methods of forming electrolyte solutions, and methods of electrodepositing zinc-iron alloys. An electrolyte solution for electroplating can include an alkali metal citrate, an alkali metal acetate, a citric acid, and glycine with a metal salt. An electrolyte solution can be formed by dissolving an alkali metal citrate, an alkali metal acetate, a citric acid, and glycine in water or an aqueous solution. Electrodepositing zinc-iron alloys on a substrate can include introducing a cathode and an anode into an electrolyte solution comprising an alkali metal citrate, an alkali metal acetate, a citric acid, and glycine. Electrodepositing can further include passing a current between the cathode and the anode through the electrolyte solution to deposit zinc and iron onto the cathode.Type: GrantFiled: August 18, 2017Date of Patent: September 8, 2020Assignee: THE BOEING COMPANYInventors: Stephen P. Gaydos, Vijaykumar S. Ijeri, Om Prakash, Trilochan Mishra, Raghuvir Singh, Shashi Kant Tiwari
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Patent number: 10738199Abstract: A corrosion-resistant coating on an aluminum-containing substrate such as an aluminum substrate, an aluminum alloy substrate (e.g., AA 2024, AA 6061, or AA7075), or other aluminum-containing substrate includes a corrosion inhibitor-incorporated Zn—Al layered double hydroxide (LDH) layer and a sol-gel layer. A zinc salt and a corrosion inhibitor (e.g., a salt of an oxyanion of a transition metal such as a vanadate) is dissolved to form a zinc-corrosion inhibitor solution, and the substrate is immersed in or otherwise contacted with the solution to form the corrosion inhibitor-incorporated Zn—Al LDH layer on the substrate. A sol-gel composition is applied on the corrosion inhibitor-incorporated Zn—Al LDH layer of the substrate to form a sol-gel layer, and the sol-gel layer is cured.Type: GrantFiled: March 15, 2019Date of Patent: August 11, 2020Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy
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Publication number: 20200208255Abstract: The present disclosure provides alloys for coating a steel substrate, the alloys comprising aluminum and one or more of zinc, magnesium, and zirconium. The alloy coatings have a percent total pore volume of about 5% or less and an average pore diameter about 10 microns or less. The present disclosure further provides methods of depositing aluminum alloy onto a substrate, magnetron sputtering targets, and methods for making coated steel.Type: ApplicationFiled: February 27, 2020Publication date: July 2, 2020Inventors: Stephen P. GAYDOS, Vijaykumar S. IJERI, Om PRAKASH, Suman K. MISHRA, Raghuvir SINGH, Sharma PASWAN, Lokesh C. PATHAK
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Patent number: 10577686Abstract: The present disclosure provides alloys for coating a steel substrate, the alloys comprising aluminum and one or more of zinc, magnesium, and zirconium. The alloy coatings have a percent total pore volume of about 5% or less and an average pore diameter about 10 microns or less. The present disclosure further provides methods of depositing aluminum alloy onto a substrate, magnetron sputtering targets, and methods for making coated steel.Type: GrantFiled: August 16, 2017Date of Patent: March 3, 2020Assignee: THE BOEING COMPANYInventors: Stephen P. Gaydos, Vijaykumar S. Ijeri, Om Prakash, Suman K. Mishra, Raghuvir Singh, Sharma Paswan, Lokesh C. Pathak
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Publication number: 20200002550Abstract: 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: ApplicationFiled: August 7, 2019Publication date: January 2, 2020Inventors: Vijaykumar S. IJERI, Om PRAKASH, Stephen P. GAYDOS, Raghavan SUBASRI, Kalidindi Ramachandra SOMA RAJU, Dendi Sreenivas REDDY
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Publication number: 20190390067Abstract: 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: ApplicationFiled: August 6, 2019Publication date: December 26, 2019Inventors: Vijaykumar S. IJERI, Om PRAKASH, Stephen P. GAYDOS, Raghavan SUBASRI, Kalidindi Ramachandra SOMA RAJU, Dendi Sreenivas REDDY
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Patent number: 10428226Abstract: 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 8, 2016Date of Patent: October 1, 2019Assignee: 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: 10421869Abstract: 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: February 13, 2017Date of Patent: September 24, 2019Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy
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Publication number: 20190264344Abstract: 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: May 4, 2018Publication date: August 29, 2019Inventors: Stephen P. GAYDOS, Vijaykumar S. IJERI, Om PRAKASH, Shashi Kant TIWARI, Raghuvir SINGH, Sharma PASWAN, Lokesh C. PATHAK
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Publication number: 20190211214Abstract: A Zn—Al layered double hydroxide (LDH) composition is added to a solution including a corrosion inhibitor and stirred, and a precipitate of the solution is collected, washed, and dried to form a corrosion inhibiting material (CIM), in which the LDH composition is intercalated with the corrosion inhibitor. An inorganic CIM and/or an organic CIM may be formed. The organic CIM may be added to a sol-gel composition to form an organic CIM-containing sol-gel composition, and the inorganic CIM may be added to a sol-gel composition to form an inorganic CIM-containing sol-gel composition. Further, the organic CIM-containing sol-gel composition may be applied on a substrate (e.g., an aluminum alloy substrate) to form an organic CIM-containing sol-gel layer and cured by ultraviolet (UV) radiation, the inorganic CIM-containing sol-gel composition may be applied on the substrate to form an inorganic CIM-containing sol-gel layer and cured by UV radiation, and the sol-gel layers may be thermally cured.Type: ApplicationFiled: March 15, 2019Publication date: July 11, 2019Inventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy
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Publication number: 20190211215Abstract: A corrosion-resistant coating on an aluminum-containing substrate such as an aluminum substrate, an aluminum alloy substrate (e.g., AA 2024, AA 6061, or AA7075), or other aluminum-containing substrate includes a corrosion inhibitor-incorporated Zn—Al layered double hydroxide (LDH) layer and a sol-gel layer. A zinc salt and a corrosion inhibitor (e.g., a salt of an oxyanion of a transition metal such as a vanadate) is dissolved to form a zinc-corrosion inhibitor solution, and the substrate is immersed in or otherwise contacted with the solution to form the corrosion inhibitor-incorporated Zn—Al LDH layer on the substrate. A sol-gel composition is applied on the corrosion inhibitor-incorporated Zn—Al LDH layer of the substrate to form a sol-gel layer, and the sol-gel layer is cured.Type: ApplicationFiled: March 15, 2019Publication date: July 11, 2019Inventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy
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Publication number: 20190160735Abstract: A method of fabricating a part includes stacking sheets of fusible material to form a stack. The method also includes directing a laser beam through at least one sheet of the stack. The method also includes transferring energy from the laser beam to multiple locations on at least one interface between adjacent sheets of the stack, according to a predetermined pattern corresponding with a design of the part, to form corresponding multiple molten regions. The molten regions are conjoined together to form a fused portion of the adjacent sheets. The fused portion of the adjacent sheets defines the part.Type: ApplicationFiled: November 30, 2017Publication date: May 30, 2019Inventors: Om Prakash, Nishant K. Sinha, Vijaykumar S. Ijeri
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Patent number: 10246593Abstract: A Zn—Al layered double hydroxide (LDH) composition is added to a solution including a corrosion inhibitor and stirred, and a precipitate of the solution is collected, washed, and dried to form a corrosion inhibiting material (CIM), in which the LDH composition is intercalated with the corrosion inhibitor. An inorganic CIM and/or an organic CIM may be formed. The organic CIM may be added to a sol-gel composition to form an organic CIM-containing sol-gel composition, and the inorganic CIM may be added to a sol-gel composition to form an inorganic CIM-containing sol-gel composition. Further, the organic CIM-containing sol-gel composition may be applied on a substrate (e.g., an aluminum alloy substrate) to form an organic CIM-containing sol-gel layer and cured by ultraviolet (UV) radiation, the inorganic CIM-containing sol-gel composition may be applied on the substrate to form an inorganic CIM-containing sol-gel layer and cured by UV radiation, and the sol-gel layers may be thermally cured.Type: GrantFiled: August 8, 2016Date of Patent: April 2, 2019Assignee: 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: 10246594Abstract: A corrosion-resistant coating on an aluminum-containing substrate such as an aluminum substrate, an aluminum alloy substrate (e.g., AA 2024, AA 6061, or AA7075), or other aluminum-containing substrate includes a corrosion inhibitor-incorporated Zn—Al layered double hydroxide (LDH) layer and a sol-gel layer. A zinc salt and a corrosion inhibitor (e.g., a salt of an oxyanion of a transition metal such as a vanadate) is dissolved to form a zinc-corrosion inhibitor solution, and the substrate is immersed in or otherwise contacted with the solution to form the corrosion inhibitor-incorporated Zn—Al LDH layer on the substrate. A sol-gel composition is applied on the corrosion inhibitor-incorporated Zn—Al LDH layer of the substrate to form a sol-gel layer, and the sol-gel layer is cured.Type: GrantFiled: August 8, 2016Date of Patent: April 2, 2019Assignee: The Boeing CompanyInventors: Vijaykumar S. Ijeri, Om Prakash, Stephen P. Gaydos, Raghavan Subasri, Kalidindi Ramachandra Soma Raju, Dendi Sreenivas Reddy