Patents by Inventor Krishnakumar Jambunathan
Krishnakumar Jambunathan 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: 9755269Abstract: The disclosure relates to new compositions comprising an, B12FxH12?x? anion that may be prepared chemically or electrochemically by oxidation of B12FxH12?x2? salts. This anion can be generated electrochemically in a voltammetry experiment, or by chemically by treatment of the (2?) anions with powerful oxidants such as XeF2 or NO2(+) salts. The new compositions can be used as 1 electron chemical oxidants and in electrochemical cells such as lithium ion batteries where their formation at elevated potential can serve to limit the upper limit of voltage during the overcharge of such a cell.Type: GrantFiled: November 25, 2008Date of Patent: September 5, 2017Assignee: Air Products and Chemicals, Inc.Inventors: William Jack Casteel, Jr., Sergei Vladimirovich Ivanov, Krishnakumar Jambunathan, Wade Hampton Bailey, III
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Patent number: 8945367Abstract: An electrolytic cell and system used for making nitrogen trifluoride consisting of a computer and an electrolytic cell having a body, an electrolyte, at least one anode chamber that produces an anode product gas, at least one cathode chamber, and one or more fluorine adjustment means to maintain fluorine or hydrogen in the anode product gas within a target amount by adjusting the concentration of fluorine in said anode product gas, and the process that controls the system.Type: GrantFiled: January 18, 2011Date of Patent: February 3, 2015Assignee: Air Products and Chemicals, Inc.Inventors: James Joseph Hart, Reinaldo Mario Machado, Howard Paul Withers, Jr., Sai-Hong A. Lo, Edward Jay Cialkowski, Krishnakumar Jambunathan
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Patent number: 8361303Abstract: The invention relates to the electrolysis of aqueous electrolyte solutions containing GeO2; hydroxide and water with metal alloy electrodes, such as, copper or tin rich alloy electrodes with alloying elements such as Sn, Pb, Zn, Cu etc, to generate Germane (GeH4). Cu-rich alloy electrodes have been demonstrated to increase the GeH4 current efficiency by almost 20% compared to Cu metal electrodes. Germanium deposition has been found to be either absent or minimal by using Cu-rich alloy electrodes. Several different methods for maintaining the cell performance or restoring the cell performance after a reduction in current efficiency over time, have been identified. A titration-based method for the analysis of the electrolyte, to obtain the concentration of GeO2 and the concentration of hydroxide has also been disclosed.Type: GrantFiled: September 2, 2010Date of Patent: January 29, 2013Assignee: Air Products and Chemicals, Inc.Inventors: Krishnakumar Jambunathan, Kerry Renard Berger, Reinaldo Mario Machado, Daniel James Ragsdale
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Publication number: 20120181182Abstract: An electrolytic cell and system used for making nitrogen trifluoride consisting of a computer and an electrolytic cell having a body, an electrolyte, at least one anode chamber that produces an anode product gas, at least one cathode chamber, and one or more fluorine adjustment means to maintain fluorine or hydrogen in the anode product gas within a target amount by adjusting the concentration of fluorine in said anode product gas, and the process that controls the system.Type: ApplicationFiled: January 18, 2011Publication date: July 19, 2012Applicant: Air Products and Chemicals, Inc.Inventors: James Joseph Hart, Reinaldo Mario Machado, Howard Paul Withers, JR., Sai-Hong A. Lo, Edward Jay Cialkowski, Krishnakumar Jambunathan
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Publication number: 20120055803Abstract: The invention relates to the electrolysis of aqueous electrolyte solutions containing GeO2; hydroxide and water with metal alloy electrodes, such as, copper or tin rich alloy electrodes with alloying elements such as Sn, Pb, Zn, Cu etc, to generate Germane (GeH4). Cu-rich alloy electrodes have been demonstrated to increase the GeH4 current efficiency by almost 20% compared to Cu metal electrodes. Germanium deposition has been found to be either absent or minimal by using Cu-rich alloy electrodes. Several different methods for maintaining the cell performance or restoring the cell performance after a reduction in current efficiency over time, have been identified. A titration-based method for the analysis of the electrolyte, to obtain the concentration of GeO2 and the concentration of hydroxide has also been disclosed.Type: ApplicationFiled: September 2, 2010Publication date: March 8, 2012Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Krishnakumar Jambunathan, Kerry Renard Berger, Reinaldo Mario Machado, Daniel James Ragsdale
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Patent number: 7785740Abstract: The invention relates to an improvement in a cell which is normally susceptible to damage from overcharging comprised of a negative electrode, a positive electrode, and an electrolyte comprised of an overcharge protection salt carried in a carrier or solvent. Representative overcharge protection salts are embraced by the formula: MaQ where M is an electrochemically stable cation selected from the group consisting of alkali metal, alkaline earth metal, tetraalkylammonium, or imidazolium groups, and Q is a borate or heteroborate cluster and a is the integer 1 or 2.Type: GrantFiled: April 1, 2005Date of Patent: August 31, 2010Assignee: Air Products and Chemicals, Inc.Inventors: Khalil Amine, Jun Liu, Krishnakumar Jambunathan, Brian Keith Peterson, Gennady Dantsin
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Patent number: 7695708Abstract: A method for generating hydrogen in a production facility having a catalytic steam reformer, a boiler downstream of the catalytic steam reformer, optionally having a prereformer, and optionally having a shift reactor, wherein the reformer feed gas mixture is formed using a steam-containing recycle gas mixture which was formed from boiler effluent. The boiler generates steam which may be used to form the reformer feed gas mixture, used elsewhere in the production facility, and/or used for export steam.Type: GrantFiled: March 26, 2007Date of Patent: April 13, 2010Assignee: Air Products and Chemicals, Inc.Inventors: Xiang-Dong Peng, James Richard O'Leary, Blaine Edward Herb, Krishnakumar Jambunathan
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Publication number: 20090297925Abstract: The disclosure relates to new compositions comprising an, B12FxH12-x? anion that may be prepared chemically or electrochemically by oxidation of B12FxH12-x2? salts. This anion can be generated electrochemically in a voltammetry experiment, or by chemically by treatment of the (2?) anions with powerful oxidants such as XeF2 or NO2(+) salts. The new compositions can be used as 1 electron chemical oxidants and in electrochemical cells such as lithium ion batteries where their fomation at elevated potential can serve to limit the upper limit of voltage during the overcharge of such a cell.Type: ApplicationFiled: November 25, 2008Publication date: December 3, 2009Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: William Jack Casteel, JR., Sergei Vladimirovich Ivanov, Krishnakumar Jambunathan, Wade Hampton Bailey, III
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Publication number: 20080241059Abstract: A method for generating hydrogen in a production facility having a catalytic steam reformer, a boiler downstream of the catalytic steam reformer, optionally having a prereformer, and optionally having a shift reactor, wherein the reformer feed gas mixture is formed using a steam-containing recycle gas mixture which was formed from boiler effluent. The boiler generates steam which may be used to form the reformer feed gas mixture, used elsewhere in the production facility, and/or used for export steam.Type: ApplicationFiled: March 26, 2007Publication date: October 2, 2008Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Xiang-Dong Peng, James Richard O'Leary, Blaine Edward Herb, Krishnakumar Jambunathan
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Publication number: 20080131772Abstract: An electrolyte comprising a salt, which will not electrochemically passivate and at least two additives. A cell comprising a positive electrode, a negative electrode and an electrolyte comprising a salt, which will not electrochemically passivate and at least two additives.Type: ApplicationFiled: February 14, 2008Publication date: June 5, 2008Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Krishnakumar Jambunathan, Gennady Dantsin, William Jack Casteel, Sergei Vladimirovich Ivanov, Zhong Shi
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Publication number: 20060216612Abstract: Electrolytes having a second cycle reduction current at 0.3 V vs Li/Li+ that is less than that of the first cycle. The electrolyte comprising a salt, which will not electrochemically passivate. A cell comprising a positive electrode, a negative electrode and an electrolyte having a second cycle reduction current at 0.3 V vs Li/Li+ that is less than that of the first cycle, said electrolyte comprising a salt, which will not electrochemically passivate. A method of forming an SEI layer in a cell comprising a positive electrode, a negative electrode and an electrolyte, said method comprising the step of overcharging the electrolyte prior to fabricating the cell, or said cell during the formation cycle.Type: ApplicationFiled: December 15, 2005Publication date: September 28, 2006Inventors: Krishnakumar Jambunathan, Gennady Dantsin, William Casteel, Sergei Ivanov
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Publication number: 20050227143Abstract: The invention relates to an improvement in a cell which is normally susceptible to damage from overcharging comprised of a negative electrode, a positive electrode, and an electrolyte comprised of an overcharge protection salt carried in a carrier or solvent. Representative overcharge protection salts are embraced by the formula: MaQ where M is an electrochemically stable cation selected from the group consisting of alkali metal, alkaline earth metal, tetraalkylammonium, or imidazolium groups, and Q is a borate or heteroborate cluster and a is the integer 1 or 2.Type: ApplicationFiled: April 1, 2005Publication date: October 13, 2005Inventors: Khalil Amine, Jun Liu, Krishnakumar Jambunathan, Brian Peterson, Gennady Dantsin