Patents by Inventor Neena Ravindran
Neena Ravindran 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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Publication number: 20230211573Abstract: A method of manufacturing a coated article comprises injecting a feedstock with a polymer resin to provide a resin-injected feedstock, pulling the resin-injected feedstock through a pultrusion die to form a pultrusion substrate having one or more profile surfaces, adhering an adhesive material comprising a thermoplastic polyurethane onto at least a portion the one or more profile surfaces to form one or more adhesive tie layers on the pultrusion substrate, and applying one or more coating materials onto the one or more adhesive tie layers to form one or more coating layers on the one or more adhesive tie layers to provide a coated pultrusion article, wherein an adhesion strength between the one or more coating layers and the one or more adhesive tie layers is higher than a corresponding adhesion strength would be between the one or more coating layers and the pultrusion substrate.Type: ApplicationFiled: March 13, 2023Publication date: July 6, 2023Inventors: Robert P. Plagemann, Neena Ravindran
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Patent number: 11602907Abstract: A method of manufacturing a coated article comprises injecting a feedstock with a polymer resin to provide a resin-injected feedstock, pulling the resin-injected feedstock through a pultrusion die to form a pultrusion substrate having one or more profile surfaces, adhering an adhesive material comprising a thermoplastic polyurethane onto at least a portion the one or more profile surfaces to form one or more adhesive tie layers on the pultrusion substrate, and applying one or more coating materials onto the one or more adhesive tie layers to form one or more coating layers on the one or more adhesive tie layers to provide a coated pultrusion article, wherein an adhesion strength between the one or more coating layers and the one or more adhesive tie layers is higher than a corresponding adhesion strength would be between the one or more coating layers and the pultrusion substrate.Type: GrantFiled: June 22, 2021Date of Patent: March 14, 2023Assignee: Tecton Products, LLCInventors: Robert P. Plagemann, Neena Ravindran
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Publication number: 20210323211Abstract: A coated article comprises a composite substrate with an outer surface and a coating comprising a protective bilayer. The bilayer includes a first thermoplastic protective layer comprising an inner face coupled to the composite substrate outer surface. The first protective layer is a first acrylic or acrylic-based polymer. The bilayer also includes a second thermoplastic protective layer coupled to the first protective layer at an interface. The second protective layer includes an outer face that opposes the interface. The second protective layer is formed from a blend of a first thermoplastic polymer and a second thermoplastic polymer. The first thermoplastic polymer comprises a fluoropolymer comprising polymerized monomer units derived from a hydrofluoro-olefin or a perfluorinated alkene or a combination thereof. The second thermoplastic polymer comprises a second acrylic or acrylic-based polymer. The first thermoplastic polymer is at least about 75 wt. % of the polymer blend.Type: ApplicationFiled: May 12, 2021Publication date: October 21, 2021Inventors: Robert P. Plagemann, Neena Ravindran
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Publication number: 20210308966Abstract: A method of manufacturing a coated article comprises injecting a feedstock with a polymer resin to provide a resin-injected feedstock, pulling the resin-injected feedstock through a pultrusion die to form a pultrusion substrate having one or more profile surfaces, adhering an adhesive material comprising a thermoplastic polyurethane onto at least a portion the one or more profile surfaces to form one or more adhesive tie layers on the pultrusion substrate, and applying one or more coating materials onto the one or more adhesive tie layers to form one or more coating layers on the one or more adhesive tie layers to provide a coated pultrusion article, wherein an adhesion strength between the one or more coating layers and the one or more adhesive tie layers is higher than a corresponding adhesion strength would be between the one or more coating layers and the pultrusion substrate.Type: ApplicationFiled: June 22, 2021Publication date: October 7, 2021Inventors: Robert P. Plagemann, Neena Ravindran
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Patent number: 11072132Abstract: A method of manufacturing a coated article comprises injecting a feedstock with a polymer resin to provide a resin-injected feedstock, pulling the resin-injected feedstock through a pultrusion die to form a pultrusion substrate having one or more profile surfaces, adhering an adhesive material comprising a thermoplastic polyurethane onto at least a portion the one or more profile surfaces to form one or more adhesive tie layers on the pultrusion substrate, and applying one or more coating materials onto the one or more adhesive tie layers to form one or more coating layers on the one or more adhesive tie layers to provide a coated pultrusion article, wherein an adhesion strength between the one or more coating layers and the one or more adhesive tie layers is higher than a corresponding adhesion strength would be between the one or more coating layers and the pultrusion substrate.Type: GrantFiled: December 27, 2018Date of Patent: July 27, 2021Assignee: Tecton Products, LLCInventors: Robert P. Plagemann, Neena Ravindran
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Publication number: 20190308396Abstract: A coated article comprises a composite substrate formed from a reinforcing feedstock at least partially embedded in a matrix polymer, the composite substrate comprising an outer surface. The coated article further includes a coating comprising a protective bilayer that includes a first protective layer comprising an inner face coupled to the outer surface of the composite substrate, and a second protective layer coupled to the first protective layer at an interface, wherein the interface opposes the inner face of the first protective layer and an outer face of the second protective layer. The first protective layer comprises a first thermoplastic polymer that is a first acrylic or acrylic-based polymer, and the second protective layer comprises a second thermoplastic polymer that is a blend of a fluoride-containing polymer and a second acrylic or acrylic-based polymer.Type: ApplicationFiled: April 9, 2019Publication date: October 10, 2019Inventors: Robert P. Plagemann, Neena Ravindran
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Publication number: 20190126571Abstract: A method of manufacturing a coated article comprises injecting a feedstock with a polymer resin to provide a resin-injected feedstock, pulling the resin-injected feedstock through a pultrusion die to form a pultrusion substrate having one or more profile surfaces, adhering an adhesive material comprising a thermoplastic polyurethane onto at least a portion the one or more profile surfaces to form one or more adhesive tie layers on the pultrusion substrate, and applying one or more coating materials onto the one or more adhesive tie layers to form one or more coating layers on the one or more adhesive tie layers to provide a coated pultrusion article, wherein an adhesion strength between the one or more coating layers and the one or more adhesive tie layers is higher than a corresponding adhesion strength would be between the one or more coating layers and the pultrusion substrate.Type: ApplicationFiled: December 27, 2018Publication date: May 2, 2019Inventors: Robert P. Plagemann, Neena Ravindran
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Publication number: 20160167259Abstract: A method of manufacturing a coated article comprises injecting a feedstock with a polymer resin to provide a resin-injected feedstock, pulling the resin-injected feedstock through a pultrusion die to form a pultrusion substrate having one or more profile surfaces, adhering one or more adhesive materials onto at least a portion the one or more profile surfaces to form one or more adhesive tie layers on the pultrusion substrate, and applying one or more coating materials onto the one or more adhesive tie layers to form one or more coating layers on the one or more adhesive tie layers to provide a coated pultrusion article, wherein an adhesion strength between the one or more coating layers and the one or more adhesive tie layers is higher than a corresponding adhesion strength would be between the one or more coating layers and the pultrusion substrate.Type: ApplicationFiled: December 15, 2015Publication date: June 16, 2016Inventors: Robert P. Plagemann, Neena Ravindran
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Publication number: 20150218411Abstract: Disclosed are methods of treating a metal to improve the metal's corrosion resistance. In one such method, the method is carried out by applying, to the surface of the metal, a coating which includes magnesium powder and a UV-curable or other radiation-curable binder. In another such method, the method is carried out by applying, to the surface of the metal, a coating which includes magnesium powder and an inorganic binder. In another such method, a coating that includes a magnesium alloy powder and a binder is applied to the surface of the metal. The magnesium alloy powder is selected such that it has a corrosion potential that is from about 0.01 volt to about 1.5 volt more negative than the metal's corrosion potential. Also disclosed are methods of treating a ferrous metals and magnesium alloys to improve the corrosion resistance of these materials.Type: ApplicationFiled: July 21, 2014Publication date: August 6, 2015Inventors: Gordon P. BIERWAGEN, Dante BATTOCCHI, Neena RAVINDRAN, Duhua WANG
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Patent number: 8828494Abstract: Disclosed are methods of treating a metal to improve the metal's corrosion resistance. In one such method, the method is carried out by applying, to the surface of the metal, a coating which includes magnesium powder and a UV-curable or other radiation-curable binder. In another such method, the method is carried out by applying, to the surface of the metal, a coating which includes magnesium powder and an inorganic binder. In another such method, a coating that includes a magnesium alloy powder and a binder is applied to the surface of the metal. The magnesium alloy powder is selected such that it has a corrosion potential that is from about 0.01 volt to about 1.5 volt more negative than the metal's corrosion potential. Also disclosed are methods of treating a ferrous metals and magnesium alloys to improve the corrosion resistance of these materials.Type: GrantFiled: September 15, 2006Date of Patent: September 9, 2014Assignee: NDSU Research FoundationInventors: Gordon P. Bierwagen, Dante Battocchi, Neena Ravindran, Duhua Wang
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Patent number: 8703838Abstract: The invention provides an improved unsaturated polyester prepared from the polycondensation of unsaturated diacid monomers or unsaturated acid anhydride mononers and polyol monomers and, optionally, one or more saturated aliphatic or aromatic diacid monomers or anhydride monomers thereof. The improvement comprises 0.5 to 50 weight percent, based on the total monomer weight, of a hydroxyalkyl-functional siloxane of formula (1) below. The invention also relates to a UV curable coating formulation containing a siloxane-functional unsaturated polyester resin, a vinyl ether functional diluents and a photoinitiator. The invention further provides a method of preparing an article with a low-surface energy coating. According to the method, at least one surface of an article with a coating formulation of the invention; and the coating is then cured as described above with UV light to form a low-surface energy coating on the surface.Type: GrantFiled: February 20, 2009Date of Patent: April 22, 2014Assignee: NDSU Research FoundationInventors: Dean C. Webster, Neena Ravindran, Ankit Vora
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Patent number: 8017795Abstract: Disclosed are coating formulations that include a copolyester and a vinyl ether in which the copolyester is produced by copolymerizing a monomer composition that includes a fused aromatic diacid monomer, an unsaturated diacid monomer, and a polyol. Also disclosed are methods for producing a laser-ablatable film on a surface of a substrate. The method includes coating the substrate with a coating formulation that includes a copolyester and a vinyl ether and polymerizing the coating formulation. The copolyester includes a fused aromatic moiety covalently bonded therein. Novel radiation curable sensitizers that can be used in the preparation of radiation curable polymer films having improved laser ablation properties are also described.Type: GrantFiled: April 21, 2006Date of Patent: September 13, 2011Assignee: NDSU Research FoundationInventors: Dean C. Webster, Zhigang Chen, Neena Ravindran
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Publication number: 20110046257Abstract: The invention provides an improved unsaturated polyester prepared from the polycondensation of unsaturated diacid monomers or unsaturated acid anhydride mononers and polyol monomers and. optionally, one or more saturated aliphatic or aromatic diacid monomers or anhydride monomers thereof. The improvement comprises 0.5 to 50 weight percent, based on the total monomer weight, of an hydroxyalkyl-functional siloxane of formula (1) below. The invention also relates to a UV curable coating formulation containing a siloxane-functional unsaturated polyester resin, a vinyl ether functional diluents and a photoinitiator. The invention further provides a method of preparing an article with a low-surface energy coating. According to the method, at least one surface of an article with a coating formulation of the invention; and the coating is then cured as described above with UV light to form a low-surface energy coating on the surface.Type: ApplicationFiled: February 20, 2009Publication date: February 24, 2011Applicant: NORTH DAKOTA STATE UNIVERSITYInventors: Dean C. Webster, Neena Ravindran, Ankit Vora
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Publication number: 20090155598Abstract: Disclosed are methods of treating a metal to improve the metal's corrosion resistance. In one such method, the method is carried out by applying, to the surface of the metal, a coating which includes magnesium powder and a UV-curable or other radiation-curable binder. In another such method, the method is carried out by applying, to the surface of the metal, a coating which includes magnesium powder and an inorganic binder. In another such method, a coating that includes a magnesium alloy powder and a binder is applied to the surface of the metal. The magnesium alloy powder is selected such that it has a corrosion potential that is from about 0.01 volt to about 1.5 volt more negative than the metal's corrosion potential. Also disclosed are methods of treating a ferrous metals and magnesium alloys to improve the corrosion resistance of these materials.Type: ApplicationFiled: September 15, 2006Publication date: June 18, 2009Applicant: NDSU RESEARCH FOUNDATIONInventors: Gordon P. Bierwagen, Dante Battocchi, Neena Ravindran, Duhua Wang
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Publication number: 20070031759Abstract: Disclosed are coating formulations that include a copolyester and a vinyl ether in which the copolyester is produced by copolymerizing a monomer composition that includes a fused aromatic diacid monomer, an unsaturated diacid monomer, and a polyol. Also disclosed are methods for producing a laser-ablatable film on a surface of a substrate. The method includes coating the substrate with a coating formulation that includes a copolyester and a vinyl ether and polymerizing the coating formulation. The copolyester includes a fused aromatic moiety covalently bonded therein. Novel radiation curable sensitizers that can be used in the preparation of radiation curable polymer films having improved laser ablation properties are also described.Type: ApplicationFiled: April 21, 2006Publication date: February 8, 2007Inventors: Dean Webster, Zhigang Chen, Neena Ravindran