Patents by Inventor Dalip Kumar Kohli
Dalip Kumar Kohli 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: 11833718Abstract: A surfacing material that is mold-releasable and electrically conductive. This surfacing material can be co-cured with a curable composite substrate and can be in contact with a mold surface such that when the cured composite part is removed from the mold, the surfacing material is releasable from the mold with ease. The mold-releasable surfacing material can effectively eliminate the need for mold release agents and mold surface preparation.Type: GrantFiled: December 28, 2020Date of Patent: December 5, 2023Assignee: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli
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Patent number: 11664647Abstract: A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.Type: GrantFiled: July 21, 2021Date of Patent: May 30, 2023Assignee: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey Sang, Fiorenzo Lenzi, Jonathan Edward Meegan, Leonard MacAdams, Yiqiang Zhao, Dalip Kumar Kohli
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Patent number: 11565825Abstract: Multifunctional surfacing materials for use in composite structures are disclosed. According to one embodiment, the surfacing material includes (a) a stiffening layer, (b) a curable resin layer, (c) a conductive layer, and (d) a nonwoven layer, wherein the stiffening layer (a) and the nonwoven layer (d) are outermost layers, and the exposed surfaces of the outermost layers are substantially tack-free at room temperature (20° C. to 25° C.). The conductive layer may be interposed between the curable resin layer and the stiffening layer or embedded in the curable resin layer. According to another embodiment, the surfacing material includes a fluid barrier film between two curable resin layers. The surfacing materials may be in the form of a continuous or elongated tape that is suitable for automated placement.Type: GrantFiled: May 3, 2021Date of Patent: January 31, 2023Assignee: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli, Kevin R. Mullery
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Publication number: 20220102957Abstract: A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.Type: ApplicationFiled: July 21, 2021Publication date: March 31, 2022Inventors: Junjie Jeffrey SANG, Fiorenzo LENZI, Jonathan Edward MEEGAN, Leonard MACADAMS, Yiqiang ZHAO, Dalip Kumar KOHLI
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Patent number: 11108220Abstract: A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.Type: GrantFiled: December 29, 2016Date of Patent: August 31, 2021Assignee: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey Sang, Fiorenzo Lenzi, Jonathan Edward Meegan, Leonard Macadams, Yiqiang Zhao, Dalip Kumar Kohli
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Publication number: 20210253270Abstract: Multifunctional surfacing materials for use in composite structures are disclosed. According to one embodiment, the surfacing material includes (a) a stiffening layer, (b) a curable resin layer, (c) a conductive layer, and (d) a nonwoven layer, wherein the stiffening layer (a) and the nonwoven layer (d) are outermost layers, and the exposed surfaces of the outermost layers are substantially tack-free at room temperature (20° C. to 25° C.). The conductive layer may be interposed between the curable resin layer and the stiffening layer or embedded in the curable resin layer. According to another embodiment, the surfacing material includes a fluid barrier film between two curable resin layers. The surfacing materials may be in the form of a continuous or elongated tape that is suitable for automated placement.Type: ApplicationFiled: May 3, 2021Publication date: August 19, 2021Inventors: Junjie Jeffrey SANG, Dalip Kumar KOHLI, Kevin R. MULLERY
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Patent number: 11027856Abstract: Multifunctional surfacing materials for use in composite structures are disclosed. According to one embodiment, the surfacing material includes (a) a stiffening layer, (b) a curable resin layer, (c) a conductive layer, and (d) a nonwoven layer, wherein the stiffening layer (a) and the nonwoven layer (d) are outermost layers, and the exposed surfaces of the outermost layers are substantially tack-free at room temperature (20° C. to 25° C.). The conductive layer may be interposed between the curable resin layer and the stiffening layer or embedded in the curable resin layer. According to another embodiment, the surfacing material includes a fluid barrier film between two curable resin layers. The surfacing materials may be in the form of a continuous or elongated tape that is suitable for automated placement.Type: GrantFiled: November 29, 2016Date of Patent: June 8, 2021Assignee: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli, Kevin R. Mullery
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Publication number: 20210122088Abstract: A surfacing material that is mold-releasable and electrically conductive. This surfacing material can be co-cured with a curable composite substrate and can be in contact with a mold surface such that when the cured composite part is removed from the mold, the surfacing material is releasable from the mold with ease. The mold-releasable surfacing material can effectively eliminate the need for mold release agents and mold surface preparation.Type: ApplicationFiled: December 28, 2020Publication date: April 29, 2021Inventors: Junjie Jeffrey SANG, Dalip Kumar KOHLI
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Patent number: 10906211Abstract: A surfacing material that is mold-releasable and electrically conductive. This surfacing material can be co-cured with a curable composite substrate and can be in contact with a mold surface such that when the cured composite part is removed from the mold, the surfacing material is releasable from the mold with ease. The mold-releasable surfacing material can effectively eliminate the need for mold release agents and mold surface preparation.Type: GrantFiled: December 21, 2016Date of Patent: February 2, 2021Assignee: Cytec Industries Inc.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli
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Patent number: 10675843Abstract: A water-based bonding primer composition and a method of applying the same onto a metallic surface prior to adhesive bonding. The bonding primer composition is a water-based dispersion containing water, one or more epoxy resins, at least one curing agent, a silane compound, a low amount of a carbon-based material in particulate form, and optional additives. The carbon-based material is selected from graphene, graphene oxide (GO), graphite, carbon with various structures in micron-scale or nanoscale size, and combination thereof.Type: GrantFiled: December 28, 2017Date of Patent: June 9, 2020Assignee: Cytec Industries Inc.Inventors: Yiqiang Zhao, Dalip Kumar Kohli
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Patent number: 10256618Abstract: An electrically conductive surfacing material capable of providing sufficient conductivity for lightning strike protection (LSP) and/or electromagnetic interference (EMI) shielding is disclosed. The conductive surfacing material is a multi-layered structure having a very thin conductive layer (e.g. solid metal foil) and a resin film formed on at least one surface of the conductive layer. The resin film is formed from a curable resin composition containing an epoxy novolac resin, a tri-functional or tetra-functional epoxy resin, ceramic microspheres, a latent amine-based curing agent, particulate inorganic fillers; and a toughening component. Optionally, the resin film further includes conductive additives to increase electrical conductivity of the surfacing material. The resin film exhibits high Tg as well as high resistance to paint stripper solutions. Furthermore, the conductive surfacing material is suitable for co-curing with fiber-reinforced resin composite substrates.Type: GrantFiled: March 1, 2017Date of Patent: April 9, 2019Assignee: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli
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Publication number: 20190027913Abstract: A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.Type: ApplicationFiled: December 29, 2016Publication date: January 24, 2019Applicant: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey SANG, Fiorenzo LENZI, Jonathan Edward MEEGAN, Leonard MACADAMS, Yiqiang ZHAO, Dalip Kumar KOHLI
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Publication number: 20180370083Abstract: A surfacing material that is mold-releasable and electrically conductive. This surfacing material can be co-cured with a curable composite substrate and can be in contact with a mold surface such that when the cured composite part is removed from the mold, the surfacing material is releasable from the mold with ease. The mold-releasable surfacing material can effectively elimiate the need for mold release agents and mold surface preparation.Type: ApplicationFiled: December 21, 2016Publication date: December 27, 2018Inventors: Junjie Jeffrey SANG, Dalip Kumar KOHLI
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Publication number: 20180346146Abstract: Multifunctional surfacing materials for use in composite structures are disclosed. According to one embodiment, the surfacing material includes (a) a stiffening layer, (b) a curable resin layer, (c) a conductive layer, and (d) a nonwoven layer, wherein the stiffening layer (a) and the nonwoven layer (d) are outermost layers, and the exposed surfaces of the outermost layers are substantially tack-free at room temperature (20° C. to 25° C.). The conductive layer may be interposed between the curable resin layer and the stiffening layer or embedded in the curable resin layer. According to another embodiment, the surfacing material includes a fluid barrier film between two curable resin layers. The surfacing materials may be in the form of a continuous or elongated tape that is suitable for automated placement.Type: ApplicationFiled: November 29, 2016Publication date: December 6, 2018Inventors: Junjie Jeffrey SANG, Dalip Kumar KOHLI, Kevin R. MULLERY
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Patent number: 10093081Abstract: A resin-rich peel ply that does not leave behind residual fibers after peeling and can work well with different resin-based composite substrates. The resin-rich peel ply is composed of a woven fabric impregnated with a resin matrix different from the resin matrix of the composite substrate. The peel ply is designed such that, upon manual removal of the peel ply from the composite substrate's surface, a thin film of the peel ply resin remains on the composite substrate's surface to create a bondable surface capable of bonding with another composite substrate, but no fibrous material from the woven fabric remains on the same surface.Type: GrantFiled: September 13, 2016Date of Patent: October 9, 2018Assignee: Cytec Technology Corp.Inventors: Yiqiang Zhao, Dalip Kumar Kohli, Kunal Gaurang Shah
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Publication number: 20180186124Abstract: A water-based bonding primer composition and a method of applying the same onto a metallic surface prior to adhesive bonding. The bonding primer composition is a water-based dispersion containing water, one or more epoxy resins, at least one curing agent, a silane compound, a low amount of a carbon-based material in particulate form, and optional additives. The carbon-based material is selected from graphene, graphene oxide (GO), graphite, carbon with various structures in micron-scale or nanoscale size, and combination thereof.Type: ApplicationFiled: December 28, 2017Publication date: July 5, 2018Applicant: Cytec Industries Inc.Inventors: Yiqiang ZHAO, Dalip Kumar KOHLI
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Patent number: 9925729Abstract: A method for making a composite structure with a surfacing film thereon. The surfacing film is co-cured with fiber-reinforced resin composite materials. The surfacing film is formed from a curable resin composition containing an epoxy novolac resin, a tri-functional or tetra-functional epoxy resin, ceramic microspheres, an amine-based curing agent, particulate inorganic fillers; and a toughening component. The surfacing film exhibits high Tg and high cross-linked density after curing, as well as high resistance to paint stripper solutions.Type: GrantFiled: March 14, 2017Date of Patent: March 27, 2018Assignee: CYTEC TECHNOLOGY CORP.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli
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Publication number: 20170182719Abstract: A method for making a composite structure with a surfacing film thereon. The surfacing film is co-cured with fiber-reinforced resin composite materials. The surfacing film is formed from a curable resin composition containing an epoxy novolac resin, a tri-functional or tetra-functional epoxy resin, ceramic microspheres, an amine-based curing agent, particulate inorganic fillers; and a toughening component. The surfacing film exhibits high Tg and high cross-linked density after curing, as well as high resistance to paint stripper solutions.Type: ApplicationFiled: March 14, 2017Publication date: June 29, 2017Applicant: CYTEC TECHNOLOGY CORP.Inventors: Junjie Jeffrey SANG, Dalip Kumar KOHLI
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Publication number: 20170179706Abstract: An electrically conductive surfacing material capable of providing sufficient conductivity for lightning strike protection (LSP) and/or electromagnetic interference (EMI) shielding is disclosed. The conductive surfacing material is a multi-layered structure having a very thin conductive layer (e.g. solid metal foil) and a resin film formed on at least one surface of the conductive layer. The resin film is formed from a curable resin composition containing an epoxy novolac resin, a tri-functional or tetra-functional epoxy resin, ceramic microspheres, a latent amine-based curing agent, particulate inorganic fillers; and a toughening component. Optionally, the resin film further includes conductive additives to increase electrical conductivity of the surfacing material. The resin film exhibits high Tg as well as high resistance to paint stripper solutions. Furthermore, the conductive surfacing material is suitable for co-curing with fiber-reinforced resin composite substrates.Type: ApplicationFiled: March 1, 2017Publication date: June 22, 2017Applicant: CYTEC INDUSTRIES INC.Inventors: Junjie Jeffrey SANG, Dalip Kumar KOHLI
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Patent number: 9676961Abstract: A surfacing film is formed from a curable resin composition containing an epoxy novolac resin, a tri-functional or tetra-functional epoxy resin, ceramic microspheres, an amine-based curing agent, particulate inorganic fillers; and a toughening component. The surfacing film exhibits high Tg and high cross-linked density after curing, as well as high resistance to paint stripper solutions. The surfacing film is suitable for co-curing with fiber-reinforced resin composite materials. The surfacing film may optionally contain electrically conductive additives to provide sufficient conductivity for lightning strike protection (LSP) or electromagnetic interference (EMI) shielding.Type: GrantFiled: December 6, 2012Date of Patent: June 13, 2017Assignee: CYTEC TECHNOLOGY CORP.Inventors: Junjie Jeffrey Sang, Dalip Kumar Kohli