Patents by Inventor Syed Dawar Sajjad
Syed Dawar Sajjad 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: 10774431Abstract: An anion-conducting polymeric membrane comprises vinylbenzyl-Rs and a substituted ethene. Rs is a positively charged cyclic amine group. The total weight of the vinylbenzyl-Rs groups is greater than 15% of the total weight of the membrane. In a preferred embodiment, the membrane is a Helper Membrane that increases the faradaic efficiency of an electrochemical cell into which the membrane is incorporated, and also allows product formation at lower voltages than in cells without the Helper Membrane.Type: GrantFiled: November 12, 2017Date of Patent: September 15, 2020Assignee: Dioxide Materials, Inc.Inventors: Richard I. Masel, Syed Dawar Sajjad, Qingmei Chen
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Publication number: 20200030787Abstract: An anion-conducting polymeric membrane comprises vinylbenzyl-Rs vinylbenzyl-Rx and styrene-Rt. Rs is a positively charged amine or phosphine group. The total weight of the vinylbenzyl-Rs groups is greater than 15% of the total weight of the membrane.Type: ApplicationFiled: August 27, 2019Publication date: January 30, 2020Inventors: Richard I. Masel, Syed Dawar Sajjad, Qingmei Chen, Zengcai Liu
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Patent number: 10428432Abstract: A catalyst layer for an electrochemical device comprises a catalytically active element and an ion conducting polymer. The ion conducting polymer comprises positively charged cyclic amine groups. The ion conducting polymer comprises at least one of an imidazolium, a pyridinium, a pyrazolium, a pyrrolidinium, a pyrrolium, a pyrimidium, a piperidinium, an indolium, a triazinium, and polymers thereof. The catalytically active element comprises at least one of V, Cr, Mn, Fe, Co, Ni, Cu, Sn, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Ir, Pt, Au, Hg, Al, Si, In, Tl, Pb, Bi, Sb, Te, U, Sm, Tb, La, Ce and Nd. In an electrolyzer comprising the present catalyst layer, the feed to the electrolyzer comprises at least one of CO2 and H2O.Type: GrantFiled: February 28, 2018Date of Patent: October 1, 2019Assignee: Dioxide Materials, Inc.Inventors: Richard I. Masel, Zengcai Liu, Robert Kutz, Syed Dawar Sajjad
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Publication number: 20190071788Abstract: A catalyst layer for an electrochemical device comprises a catalytically active element and an ion conducting polymer. The ion conducting polymer comprises positively charged cyclic amine groups. The ion conducting polymer comprises at least one of an imidazolium, a pyridinium, a pyrazolium, a pyrrolidinium, a pyrrolium, a pyrimidium, a piperidinium, an indolium, a triazinium, and polymers thereof. The catalytically active element comprises at least one of V, Cr, Mn, Fe, Co, Ni, Cu, Sn, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Ir, Pt, Au, Hg, Al, Si, In, Tl, Pb, Bi, Sb, Te, U, Sm, Tb, La, Ce and Nd. In an electrolyzer comprising the present catalyst layer, the feed to the electrolyzer comprises at least one of CO2 and H2O.Type: ApplicationFiled: February 28, 2018Publication date: March 7, 2019Inventors: Richard I. Masel, Zengcai Liu, Robert Kutz, Syed Dawar Sajjad
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Publication number: 20190010620Abstract: An electrochemical device converts carbon dioxide to a formic acid reaction product. The device includes an anode and a cathode, each comprising a quantity of catalyst. The anode and cathode each have reactant introduced thereto. A cation exchange polymer electrolyte membrane and an anion exchange polymer electrolyte membrane, are interposed between the anode and the cathode, forming a central flow compartment where a carbon dioxide reduction product, such as formic acid, can be recovered. At least a portion of the cathode catalyst is directly exposed to gaseous carbon dioxide during electrolysis. The average current density at the membrane is at least 20 mA/cm2, measured as the area of the cathode gas diffusion layer that is covered by catalyst, and formate ion selectivity is at least 50% at a cell potential difference of 3.0 V.Type: ApplicationFiled: June 30, 2018Publication date: January 10, 2019Inventors: Jerry J. Kaczur, Hongzhou Yang, Syed Dawar Sajjad, Richard I. Masel
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Patent number: 10047446Abstract: An electrochemical device converts carbon dioxide to a formic acid reaction product. The device includes an anode and a cathode, each comprising a quantity of catalyst. The anode and cathode each have reactant introduced thereto. Two membranes, a cation exchange polymer electrolyte membrane and an anion exchange polymer electrolyte membrane, are interposed between the anode and the cathode, forming a central flow compartment where a carbon dioxide reduction product, such as formic acid, can be recovered. At least a portion of the cathode catalyst is directly exposed to gaseous carbon dioxide during electrolysis. The average current density at the membrane is at least 20 mA/cm2, measured as the area of the cathode gas diffusion layer that is covered by catalyst, and formate ion selectivity is at least 50% at a cell potential difference of 3.0 V.Type: GrantFiled: September 8, 2016Date of Patent: August 14, 2018Assignee: Dioxide Materials, Inc.Inventors: Jerry J. Kaczur, Hongzhou Yang, Syed Dawar Sajjad, Richard I. Masel
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Publication number: 20180171495Abstract: An anion-conducting polymeric membrane comprises vinylbenzyl-Rs and a substituted ethene. Rs is a positively charged cyclic amine group. The total weight of the vinylbenzyl-Rs groups is greater than 15% of the total weight of the membrane. In a preferred embodiment, the membrane is a Helper Membrane that increases the faradaic efficiency of an electrochemical cell into which the membrane is incorporated, and also allows product formation at lower voltages than in cells without the Helper Membrane.Type: ApplicationFiled: November 12, 2017Publication date: June 21, 2018Inventors: Richard I. Masel, Syed Dawar Sajjad, Qingmei Chen
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Patent number: 9945040Abstract: A catalyst layer for an electrochemical device comprises a catalytically active element and an ion conducting polymer. The ion conducting polymer comprises positively charged cyclic amine groups. The ion conducting polymer comprises at least one of an imidazolium, a pyridinium, a pyrazolium, a pyrrolidinium, a pyrrolium, a pyrimidium, a piperidinium, an indolium, a triazinium, and polymers thereof. The catalytically active element comprises at least one of V, Cr, Mn, Fe, Co, Ni, Cu, Sn, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Ir, Pt, Au, Hg, Al, Si, In, Tl, Pb, Bi, Sb, Te, U, Sm, Tb, La, Ce and Nd. In an electrolyzer comprising the present catalyst layer, the feed to the electrolyzer comprises at least one of CO2 and H2O.Type: GrantFiled: May 18, 2016Date of Patent: April 17, 2018Assignee: Dioxide Materials, Inc.Inventors: Richard I. Masel, Zengcai Liu, Robert Kutz, Syed Dawar Sajjad
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Patent number: 9943841Abstract: A method to manufacture an ion exchange membrane involves treatment of the membrane in a strong base to strengthen the membrane, decrease the membrane solubility, and create linkages that can be detected by analysis using two-dimensional nuclear magnetic resonance (NMR).Type: GrantFiled: January 20, 2017Date of Patent: April 17, 2018Assignee: Dioxide Materials, Inc.Inventors: Richard I. Masel, Syed Dawar Sajjad, Mark J. Pellerite
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Patent number: 9849450Abstract: An anion-conducting polymeric membrane comprises a terpolymer of styrene, vinylbenzyl-Rs and vinylbenzyl-Rx. Rs is a positively charged cyclic amine group. Rx is at least one constituent selected from the group consisting Cl, OH and a reaction product between an OH or Cl and a species other than a simple amine or a cyclic amine. The total weight of the vinylbenzyl-Rx groups is greater than 0.3% of the total weight of the membrane. In a preferred embodiment, the membrane is a Helper Membrane that increases the faradaic efficiency of an electrochemical cell into which the membrane is incorporated, and also allows product formation at lower voltages than in cells without the Helper Membrane.Type: GrantFiled: January 6, 2017Date of Patent: December 26, 2017Assignee: Dioxide Materials, Inc.Inventors: Richard I. Masel, Syed Dawar Sajjad, Yan Gao, Zengcai Liu, Qingmei Chen
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Publication number: 20170189898Abstract: A method to manufacture an ion exchange membrane involves treatment of the membrane in a strong base to strengthen the membrane, decrease the membrane solubility, and create linkages that can be detected by analysis using two-dimensional nuclear magnetic resonance (NMR).Type: ApplicationFiled: January 20, 2017Publication date: July 6, 2017Inventors: Richard I. Masel, Syed Dawar Sajjad, Mark J. Pellerite
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Publication number: 20170128930Abstract: An anion-conducting polymeric membrane comprises a terpolymer of styrene, vinylbenzyl-Rs and vinylbenzyl-Rx. Rs is a positively charged cyclic amine group. Rx is at least one constituent selected from the group consisting Cl, OH and a reaction product between an OH or Cl and a species other than a simple amine or a cyclic amine. The total weight of the vinylbenzyl-Rx groups is greater than 0.3% of the total weight of the membrane. In a preferred embodiment, the membrane is a Helper Membrane that increases the faradaic efficiency of an electrochemical cell into which the membrane is incorporated, and also allows product formation at lower voltages than in cells without the Helper Membrane.Type: ApplicationFiled: January 6, 2017Publication date: May 11, 2017Inventors: Richard I. Masel, Syed Dawar Sajjad, Yan Gao, Zengcai Liu, Qingmei Chen
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Publication number: 20170037522Abstract: An electrochemical device converts carbon dioxide to a formic acid reaction product. The device includes an anode and a cathode, each comprising a quantity of catalyst. The anode and cathode each have reactant introduced thereto. Two membranes, a cation exchange polymer electrolyte membrane and an anion exchange polymer electrolyte membrane, are interposed between the anode and the cathode, forming a central flow compartment where a carbon dioxide reduction product, such as formic acid, can be recovered. At least a portion of the cathode catalyst is directly exposed to gaseous carbon dioxide during electrolysis. The average current density at the membrane is at least 20 mA/cm2, measured as the area of the cathode gas diffusion layer that is covered by catalyst, and formate ion selectivity is at least 50% at a cell potential difference of 3.0 V.Type: ApplicationFiled: September 8, 2016Publication date: February 9, 2017Inventors: Jerry J. Kaczur, Hongzhou Yang, Syed Dawar Sajjad, Richard I. Masel
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Publication number: 20160369415Abstract: A catalyst layer for an electrochemical device comprises a catalytically active element and an ion conducting polymer. The ion conducting polymer comprises positively charged cyclic amine groups. The ion conducting polymer comprises at least one of an imidazolium, a pyridinium, a pyrazolium, a pyrrolidinium, a pyrrolium, a pyrimidium, a piperidinium, an indolium, a triazinium, and polymers thereof. The catalytically active element comprises at least one of V, Cr, Mn, Fe, Co, Ni, Cu, Sn, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Ir, Pt, Au, Hg, Al, Si, In, Tl, Pb, Bi, Sb, Te, U, Sm, Tb, La, Ce and Nd. In an electrolyzer comprising the present catalyst layer, the feed to the electrolyzer comprises at least one of CO2 and H2O.Type: ApplicationFiled: May 18, 2016Publication date: December 22, 2016Inventors: Richard I. Masel, Zengcai Liu, Robert Kutz, Syed Dawar Sajjad