Patents by Inventor Sudhir Mulik
Sudhir Mulik 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: 20240141125Abstract: Porous three-dimensional networks of polyurea and porous three-dimensional networks of carbon and methods of their manufacture are described. In an example, polyurea aerogels are prepared by mixing an triisocyanate with water and a triethylamine to form a sol-gel material and supercritically drying the sol-gel material to form the polyurea aerogel. Subjecting the polyurea aerogel to a step of pyrolysis may result in a three dimensional network having a carbon skeleton, yielding a carbon aerogel. The density and morphology of polyurea aerogels can be controlled by varying the amount of isocyanate monomer in the initial reaction mixture. A lower density in the aerogel gives rise to a fibrous morphology, whereas a greater density in the aerogel results in a particulate morphology. Polyurea aerogels described herein may also exhibit a reduced flammability.Type: ApplicationFiled: May 18, 2023Publication date: May 2, 2024Applicant: Aerogel Technologies, LLCInventors: Nicholas Leventis, Chariklia Sotiriou-Leventis, Sudhir Mulik
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Publication number: 20230086996Abstract: Binder compositions and processes for making and using same. In some embodiments, the binder composition can include a urea-based compound, a bifunctional quaternary ammonium salt, and an aldehyde-based resin. In some embodiments, a resinated substrate can include a plurality of substrates and the binder composition. In some embodiments, a process for making a composite product can include contacting a plurality of substrates with the binder composition. The process can also include heating the resinated substrate to at least partially cure the aldehyde-based resin to produce the composite product. In some embodiments, a composite product can include the plurality of substrates and the aldehyde-based resin at least partially cured. In some embodiments, the plurality of substrates can include lignocellulosic substrates. In other embodiments, the plurality of substrates can include glass fibers.Type: ApplicationFiled: January 20, 2021Publication date: March 23, 2023Applicant: Georgia-Pacific Chemicals LLCInventors: Sudhir Mulik, Robert Breyer, Cornel Hagiopol, Robert Miller
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Publication number: 20220298321Abstract: Porous three-dimensional networks of polyurea and porous three-dimensional networks of carbon and methods of their manufacture are described. In an example, polyurea aerogels are prepared by mixing an triisocyanate with water and a triethylamine to form a sol-gel material and supercritically drying the sol-gel material to form the polyurea aerogel. Subjecting the polyurea aerogel to a step of pyrolysis may result in a three dimensional network having a carbon skeleton, yielding a carbon aerogel. The density and morphology of polyurea aerogels can be controlled by varying the amount of isocyanate monomer in the initial reaction mixture. A lower density in the aerogel gives rise to a fibrous morphology, whereas a greater density in the aerogel results in a particulate morphology. Polyurea aerogels described herein may also exhibit a reduced flammability.Type: ApplicationFiled: November 1, 2021Publication date: September 22, 2022Applicant: Aerogel Technologies, LLCInventors: Nicholas Leventis, Chariklia Sotiriou-Leventis, Sudhir Mulik
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Patent number: 11192994Abstract: Porous three-dimensional networks of polyurea and porous three-dimensional networks of carbon and methods of their manufacture are described. In an example, polyurea aerogels are prepared by mixing an triisocyanate with water and a triethylamine to form a sol-gel material and supercritically drying the sol-gel material to form the polyurea aerogel. Subjecting the polyurea aerogel to a step of pyrolysis may result in a three dimensional network having a carbon skeleton, yielding a carbon aerogel. The density and morphology of polyurea aerogels can be controlled by varying the amount of isocyanate monomer in the initial reaction mixture. A lower density in the aerogel gives rise to a fibrous morphology, whereas a greater density in the aerogel results in a particulate morphology. Polyurea aerogels described herein may also exhibit a reduced flammability.Type: GrantFiled: April 4, 2019Date of Patent: December 7, 2021Assignee: Aerogel Technologies, LLCInventors: Nicholas Leventis, Chariklia Sotiriou-Leventis, Sudhir Mulik
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Publication number: 20200071482Abstract: Porous three-dimensional networks of polyurea and porous three-dimensional networks of carbon and methods of their manufacture are described. In an example, polyurea aerogels are prepared by mixing an triisocyanate with water and a triethylamine to form a sol-gel material and supercritically drying the sol-gel material to form the polyurea aerogel. Subjecting the polyurea aerogel to a step of pyrolysis may result in a three dimensional network having a carbon skeleton, yielding a carbon aerogel. The density and morphology of polyurea aerogels can be controlled by varying the amount of isocyanate monomer in the initial reaction mixture. A lower density in the aerogel gives rise to a fibrous morphology, whereas a greater density in the aerogel results in a particulate morphology. Polyurea aerogels described herein may also exhibit a reduced flammability.Type: ApplicationFiled: April 4, 2019Publication date: March 5, 2020Applicant: Aerogel Technologies, LLCInventors: Nicholas Leventis, Chariklia Sotiriou-Leventis, Sudhir Mulik
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Patent number: 10301445Abstract: Porous three-dimensional networks of polyurea and porous three-dimensional networks of carbon and methods of their manufacture are described. In an example, polyurea aerogels are prepared by mixing an triisocyanate with water and a triethylamine to form a sol-gel material and supercritically drying the sol-gel material to form the polyurea aerogel. Subjecting the polyurea aerogel to a step of pyrolysis may result in a three dimensional network having a carbon skeleton, yielding a carbon aerogel. The density and morphology of polyurea aerogels can be controlled by varying the amount of isocyanate monomer in the initial reaction mixture. A lower density in the aerogel gives rise to a fibrous morphology, whereas a greater density in the aerogel results in a particulate morphology. Polyurea aerogels described herein may also exhibit a reduced flammability.Type: GrantFiled: August 19, 2011Date of Patent: May 28, 2019Assignee: Aerogel Technologies, LLCInventors: Nicholas Leventis, Chariklia Sotiriou-Leventis, Sudhir Mulik
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Publication number: 20120152846Abstract: Porous three-dimensional networks of polyurea and porous three-dimensional networks of carbon and methods of their manufacture are described. In an example, polyurea aerogels are prepared by mixing an triisocyanate with water and a triethylamine to form a sol-gel material and supercritically drying the sol-gel material to form the polyurea aerogel. Subjecting the polyurea aerogel to a step of pyrolysis may result in a three dimensional network having a carbon skeleton, yielding a carbon aerogel. The density and morphology of polyurea aerogels can be controlled by varying the amount of isocyanate monomer in the initial reaction mixture. A lower density in the aerogel gives rise to a fibrous morphology, whereas a greater density in the aerogel results in a particulate morphology. Polyurea aerogels described herein may also exhibit a reduced flammability.Type: ApplicationFiled: August 19, 2011Publication date: June 21, 2012Applicant: Aerogel Technologies, LLC.Inventors: Nicholas Leventis, Chariklia Sotiriou-Leventis, Sudhir Mulik
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Publication number: 20100247897Abstract: A bidentate free radical crosslinking initiator binds chemically to silica and silica rich surfaces and enables the free radical based polymerization of various materials such as styrene, divinylbenzene and methylmethacrylate onto silica and silica rich surfaces. When used in connection with aerogels, the resultant crosslinked aerogels exhibit greatly increased strength with only nominal increase in density.Type: ApplicationFiled: September 5, 2008Publication date: September 30, 2010Inventors: Nicholas Leventis, Sudhir Mulik, Chariklia Sotiriou-Leventis
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Publication number: 20100204355Abstract: Macroporous monolithic silica aerogels having mesoporous walls are produced via an acid-catalyzed sol-gel process from tetramethoxysilane (TMOS) using a triblock co-polymer (Pluronic P123) as a structure-directing agent and 1,3,5-trimethylbenzene (TMB) as a micelle-swelling reagent. Pluronic P 123 was removed by solvent extraction, and monoliths were obtained by removing the pore-filling solvent with liquid CO2, which was removed under supercritical conditions. The resulting materials are more robust compared to base-catalyzed silica aerogels of similar density. Mechanical properties can be further improved by reacting a di-isocyanate with the silanol groups on the macro and mesoporous surfaces. The polymer forms a conformal coat on the macropores and blocks access to the mesopores of templated samples, so that BET surface areas decrease dramatically.Type: ApplicationFiled: September 5, 2008Publication date: August 12, 2010Inventors: Nicholas Leventis, Sudhir Mulik, Xiaojiang Wang, Chariklia Sotiriou-Leventis