Patents by Inventor Redouane Begag
Redouane Begag 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: 7504346Abstract: Aerogel composite materials having a lofty fibrous batting reinforcement preferably in combination with one or both of individual short randomly oriented microfibers and conductive layers exhibit improved performance in one or all of flexibility, drape, durability, resistance to sintering, x-y thermal conductivity, x-y electrical conductivity, RFI-EMI attenuation, and/or burn-through resistance.Type: GrantFiled: May 18, 2006Date of Patent: March 17, 2009Assignee: Aspen Aerogels, Inc.Inventors: Christopher J. Stepanian, George L. Gould, Redouane Begag
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Publication number: 20070217986Abstract: An embodiment of the present invention describes aerogel materials comprising an additive comprising a compound comprising at least two different metal elements. Another embodiment, involves aerogel particulates in combination with said compound. Said compound preferably comprises at least two different transition metal elements and may be in an oxide form.Type: ApplicationFiled: March 18, 2006Publication date: September 20, 2007Applicant: Aspen Aerogels Inc.Inventors: George Gould, Wendell Rhine, Redouane Begag, Xiangjun Hu
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Publication number: 20070152363Abstract: This invention relates to methods of preparing porous gels with improved consistencies and properties by stabilizing gel precursors. It further relates to processing of precursors, sol and other ingredients for casting gels in a continuous fashion.Type: ApplicationFiled: December 29, 2006Publication date: July 5, 2007Applicant: ASPEN AEROGELS, INC.Inventors: Redouane Begag, Jong Sonn
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Publication number: 20060246806Abstract: The invention provides reinforced aerogel monoliths as well as fiber reinforced composites thereof for a variety of uses. Compositions and methods of preparing the monoliths and composites are also provided. Application of these materials in transparent assemblies is also discussed.Type: ApplicationFiled: March 11, 2006Publication date: November 2, 2006Applicant: Aspen Aerogels, Inc.Inventors: Wendell Rhine, George Gould, Redouane Begag, Jong Sonn, Duan Ou
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Publication number: 20060199455Abstract: Aerogel composite materials having a lofty fibrous batting reinforcement preferably in combination with one or both of individual short randomly oriented microfibers and conductive layers exhibit improved performance in one or all of flexibility, drape, durability, resistance to sintering, x-y thermal conductivity, x-y electrical conductivity, RFI-EMI attenuation, and/or burn-through resistance.Type: ApplicationFiled: May 18, 2006Publication date: September 7, 2006Applicant: Aspen Aerogels, Inc.Inventors: Christopher Stepanian, George Gould, Redouane Begag
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Patent number: 7078359Abstract: Aerogel composite materials having a lofty fibrous batting reinforcement preferably in combination with one or both of individual short randomly oriented microfibers and conductive layers exhibit improved performance in one or all of flexibility, drape, durability, resistance to sintering, x-y thermal conductivity, x-y electrical conductivity, RFI-EMI attenuation, and/or burn-through resistance.Type: GrantFiled: December 21, 2001Date of Patent: July 18, 2006Assignee: Aspen Aerogels, Inc.Inventors: Christopher J. Stepanian, George L. Gould, Redouane Begag
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Patent number: 7074880Abstract: A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to produce carbon aerogels derived from polyimide aerogel composed of a rigid aromatic diamine and an aromatic dianhydride. Finally, the processes to produce carbon aerogels or xerogel-aerogel hybrid, both of which impregnated with highly dispersed transition metal clusters, and metal carbide aerogels, deriving from the polyimide aerogels composed of a rigid aromatic diamine and an aromatic dianhydride, are described. The polyimide aerogels and the polyimide aerogel derivatives consist of interconnecting mesopores with average pore size at 10 to 30 nm and a mono-dispersed pore size distribution. The gel density could be as low as 0.008 g/cc and accessible surface area as high as 1300 m2/g.Type: GrantFiled: July 22, 2003Date of Patent: July 11, 2006Assignee: Aspen Aerogels, Inc.Inventors: Wendell Rhine, Jing Wang, Redouane Begag
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Patent number: 7071287Abstract: A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to produce carbon aerogels derived from polyimide aerogel composed of a rigid aromatic diamine and an aromatic dianhydride. Finally, the processes to produce carbon aerogels or xerogel-aerogel hybrid, both of which impregnated with highly dispersed transition metal clusters, and metal carbide aerogels, deriving from the polyimide aerogels composed of a rigid aromatic diamine and an aromatic dianhydride, are described. The polyimide aerogels and the polyimide aerogel derivatives consist of interconnecting mesopores with average pore size at 10 to 30 nm and a mono-dispersed pore size distribution. The gel density could be as low as 0.008 g/cc and accessible surface area as high as 1300 m2/g.Type: GrantFiled: January 28, 2005Date of Patent: July 4, 2006Assignee: Aspen Aerogels, Inc.Inventors: Wendell Rhine, Jing Wang, Redouane Begag
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Publication number: 20050131163Abstract: A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to produce carbon aerogels derived from polyimide aerogel composed of a rigid aromatic diamine and an aromatic dianhydride. Finally, the processes to produce carbon aerogels or xerogel-aerogel hybrid, both of which impregnated with highly dispersed transition metal clusters, and metal carbide aerogels, deriving from the polyimide aerogels composed of a rigid aromatic diamine and an aromatic dianhydride, are described. The polyimide aerogels and the polyimide aerogel derivatives consist of interconnecting mesopores with average pore size at 10 to 30 nm and a mono-dispersed pore size distribution. The gel density could be as low as 0.008 g/cc and accessible surface area as high as 1300 m2/g.Type: ApplicationFiled: January 28, 2005Publication date: June 16, 2005Inventors: Wendell Rhine, Jing Wang, Redouane Begag
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Publication number: 20040132845Abstract: A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to produce carbon aerogels derived from polyimide aerogel composed of a rigid aromatic diamine and an aromatic dianhydride. Finally, the processes to produce carbon aerogels or xerogel-aerogel hybrid, both of which impregnated with highly dispersed transition metal clusters, and metal carbide aerogels, deriving from the polyimide aerogels composed of a rigid aromatic diamine and an aromatic dianhydride, are described. The polyimide aerogels and the polyimide aerogel derivatives consist of interconnecting mesopores with average pore size at 10 to 30 nm and a mono-dispersed pore size distribution. The gel density could be as low as 0.008 g/cc and accessible surface area as high as 1300 m2/g.Type: ApplicationFiled: July 22, 2003Publication date: July 8, 2004Applicant: Aspen Aerogels, Inc.Inventors: Wendell Rhine, Jing Wang, Redouane Begag
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Publication number: 20040087670Abstract: Methods of more rapidly producing aerogel products by means of a rapid solvent exchange of solvent inside wet gels with supercritical CO2 by injecting supercritical, rather than liquid, CO2 into an extractor that has been pre-heated and pre-pressurized to substantially supercritical conditions or above. Preferably, pressure waves are applied to the supercritical CO2 to enhance the solvent exchange. The rapid solvent exchange process is followed by depressurization, optionally with a gas exchange. Preferably, pressure waves are used to speed up the depressurization. The process greatly reduces the time for forming aerogel products.Type: ApplicationFiled: July 16, 2003Publication date: May 6, 2004Inventors: Kang P. Lee, Redouane Begag, Zlatko Altiparmakov
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Patent number: 6670402Abstract: Methods of more rapidly producing aerogel products by means of a rapid solvent exchange of solvent inside wet gels with supercritical CO2 by injecting supercritical, rather than liquid, CO2 into an extractor that has been pre-heated and pre-pressurized to substantially supercritical conditions or above. Preferably, pressure waves are applied to the supercritical CO2 to enhance the solvent exchange. The rapid solvent exchange process is followed by depressurization, optionally with a gas exchange. Preferably, pressure waves are used to speed up the depressurization. The process greatly reduces the time for forming aerogel products.Type: GrantFiled: October 20, 2000Date of Patent: December 30, 2003Assignee: Aspen Aerogels, Inc.Inventors: Kang P. Lee, Redouane Begag, Zlatko Altiparmakov
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Publication number: 20020094426Abstract: Aerogel composite materials having a lofty fibrous batting reinforcement preferably in combination with one or both of individual short randomly oriented microfibers and conductive layers exhibit improved performance in one or all of flexibility, drape, durability, resistance to sintering, x-y thermal conductivity, x-y electrical conductivity, RFI-EMI attenuation, and/or burn-through resistance.Type: ApplicationFiled: December 21, 2001Publication date: July 18, 2002Applicant: Aspen Aerogels, Inc.Inventors: Christopher J. Stepanian, George L. Gould, Redouane Begag
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Patent number: 5795557Abstract: A process for the preparation of a silica aerogel that includes subjecting a mixture that includes an organosilicon compound and ethyl acetoacetate to hydrolysis and polycondensation in an acidic medium to obtain a transparent gel. The organic solvent is substituted by liquid carbon dioxide and the carbon dioxide is evacuated under supercritical conditions of the carbon dioxide to obtain an aerogel.Type: GrantFiled: July 3, 1996Date of Patent: August 18, 1998Assignees: Universite Claude Bernard, Produits Chimiques Auxiliares, Armienes, Centre Scientifique et Technque Du BatimentInventors: Gerard Pajonk, Elimame Elaloui, Redouane Begag, Marcel Durant, Bruno Chevalier, Jean-Luc Chevalier, Patrick Achard