Patents by Inventor Madan Singh
Madan Singh 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: 20240134824Abstract: A multi-cluster configuration of a database management system in a virtual computing system includes a server that defines a first policy for a source database on a first cluster of a plurality of clusters. Each of the plurality of clusters is registered with the server and the first policy defines capture of snapshots and/or transactional logs from the source database on the first cluster. The server defines a second policy for the source database to replicate at least some of the snapshots and/or transactional logs from the first cluster to a second cluster of the plurality of clusters, captures a first snapshot and/or a first transactional log from the source database in accordance with the first policy, and replicates the first snapshot and/or the first transactional log to the second cluster in accordance with the second policy.Type: ApplicationFiled: January 2, 2024Publication date: April 25, 2024Applicant: Nutanix, Inc.Inventors: Kamaldeep Khanuja, Yashesh Mankad, Sagar Sontakke, Bakul Banthia, Balasubrahmanyam Kuchibhotla, Anil Madan, Manish Pratap Singh
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Patent number: 10577433Abstract: The present application provides an improved process for the preparation of sugammadex by reacting a salt of 3-mercapto propionic acid with 6-per-deoxy-6-per-halo-?-cyclodextrin in a suitable organic solvent. This application also provides crystalline form of a salt of 3-mercapto propionic acid, preferably di sodium salt of 3-mercapto propionic acid and its use for the preparation of sugammadex, whereas formula (I) shows the sodium salt of sugammadex.Type: GrantFiled: March 20, 2017Date of Patent: March 3, 2020Assignee: Fresenius Kabi iPSUM S.r.l.Inventors: Walter Cabri, Antonio Ricci, Jacopo Zanon, Saswata Lahiri, Govind Singh, Shivaji Haribhau Shelke, Tapanjyoti Biswal, Nitin Kumar, Madan Singh
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Publication number: 20190284308Abstract: The present application provides an improved process for the preparation of sugammadex by reacting a salt of 3-mercapto propionic acid with 6-per-deoxy-6-per-halo-?-cyclodextrin in a suitable organic solvent. This application also provides crystalline form of a salt of 3-mercapto propionic acid, preferably di sodium salt of 3-mercapto propionic acid and its use for the preparation of sugammadex, whereas formula (I) shows the sodium salt of sugammadex.Type: ApplicationFiled: March 20, 2017Publication date: September 19, 2019Applicant: FRESENIUS KABI IPSUM S.R.L.Inventors: Walter CABRI, Antonio RICCI, Jacopo ZANON, Saswata LAHIRI, Govind SINGH, Shivaji Haribhau SHELKE, Tapanjyoti BISWAL, Nitin KUMAR, Madan SINGH
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Patent number: 10414830Abstract: The present application provides crystalline forms of 6-per-deoxy-6-per-chloro-?-cyclodextrin, and polymorphs thereof. The present application also provides methods for preparing said polymorphs by dissolving 6-per-deoxy-6-per-chloro-?-cyclodextrin in dimethylformamide and using an anti-solvent of a water/alcohol mixture.Type: GrantFiled: November 24, 2016Date of Patent: September 17, 2019Assignee: FRESENIUS KABI IPSUM S.R.L.Inventors: Walter Cabri, Antonio Ricci, Jacopo Zanon, Saswata Lahiri, Govind Singh, Shivaji Haribhau Shelke, Shridhar Reddy, Nitin Kumar, Madan Singh
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Publication number: 20180346608Abstract: The present application provides crystalline forms of 6-per-deoxy-6-per-chloro-?-cyclodextrin, and polymorphs thereof. The present application also provides methods for preparing said polymorphs by dissolving 6-per-deoxy-6-per-chloro-?-cyclodextrin in dimethylformamide and using an anti-solvent of a water/alcohol mixture.Type: ApplicationFiled: November 24, 2016Publication date: December 6, 2018Applicant: FRESENIUS KABI IPSUM S.R.L.Inventors: Walter CABRI, Antonio RICCI, Jacopo ZANON, Saswata LAHIRI, Govind SINGH, Shivaji Haribhau SHELKE, Shridhar REDDY, Nitin KUMAR, Madan SINGH
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Patent number: 6667418Abstract: A method and system is provided for producing acetic acid by the catalytic carbonylation of methanol with carbon monoxide to obtain a reaction product stream comprising acetic acid and a minor amount of acetaldehyde. The acetaldehyde content in the reaction product stream is reduced by oxidation to convert at least a portion of the acetaldehyde in the stream to acetic acid or further to CO2 and H2O. The oxidized stream may then be directed to the purification section, the reaction section, or both whereby the deleterious effects of acetaldehyde are reduced. Advantage of the present invention over conventional processes is the reduced need to dispose of acetaldehyde as waste and improved overall system efficiency in the production of acetic acid.Type: GrantFiled: April 16, 2002Date of Patent: December 23, 2003Assignee: Celanese International CorporationInventors: Jerry A. Broussard, Hung-Cheun Cheung, Stephen Andrew Houliston, Michael E. Huckman, Peggy McKarns Macatangay, Madan Singh, Michael L. Karnilaw, G. Paull Torrence
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Publication number: 20030199711Abstract: A method and system is provided for producing acetic acid by the catalytic carbonylation of methanol with carbon monoxide to obtain a reaction product stream comprising acetic acid and a minor amount of acetaldehyde. The acetaldehyde content in the reaction product stream is reduced by oxidation to convert at least a portion of the acetaldehyde in the stream to acetic acid or further to CO2 and H2O. The oxidized stream may then be directed to the purification section, the reaction section, or both whereby the deleterious effects of acetaldehyde are reduced. Advantage of the present invention over conventional processes is the reduced need to dispose of acetaldehyde as waste and improved overall system efficiency in the production of acetic acid.Type: ApplicationFiled: April 16, 2002Publication date: October 23, 2003Inventors: Jerry A. Broussard, Hung-Cheun Cheung, Stephen Andrew Houliston, Michael E. Huckman, Peggy McKarns MacAtangay, Madan Singh, Michael L. Karnilaw, G.Paull Torrence
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Patent number: 6339171Abstract: Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde and its derivatives, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional post extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower.Type: GrantFiled: May 3, 1999Date of Patent: January 15, 2002Assignee: Celanese International CorporationInventors: Madan Singh, George A. Blay, Michael L. Karnilaw, Melchior A. Meilchen, Robin Suzanne Tanke, G. Paull Torrence
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Patent number: 6207859Abstract: A process for inhibiting free-radical polymerization of an alpha,beta-unsaturated (&agr;,&bgr;-unsaturated) carboxylic acid, and for providing desired grade &agr;,&bgr;-unsaturated carboxylic acid for use following storage and transport is described herein. In particular, bulk storage and shipment such as with overseas transport is described. The process comprises combining the &agr;,&bgr;-unsaturated carboxylic acid with a phenolic inhibitor and a coinhibitor to form an inhibited mixture, storing the inhibited mixture, transporting the inhibited mixture, and removing the coinhibitor to provide the desired grade &agr;,&bgr;-unsaturated carboxylic acid for use. In preferred embodiments, the &agr;,&bgr;-unsaturated carboxylic acid is acrylic acid, the phenolic inhibitor is p-methoxyphenol, the coinhibitor is manganese cation, and removal of the coinhibitor is carried out using an ion exchange resin.Type: GrantFiled: September 23, 1999Date of Patent: March 27, 2001Assignee: Celanese International CorporationInventors: Leon B. Levy, Edward F. Dougherty, Charles C. Hobbs, Jr., Jerome F. Perez, Mark O. Scates, Madan Singh
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Patent number: 6143930Abstract: Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower.Type: GrantFiled: October 17, 1997Date of Patent: November 7, 2000Assignee: Celanese International CorpInventors: Madan Singh, George A. Blay, Michael L. Karnilaw, Melchior A. Meilchen, Wayne David Picard, Valerie Santillan, Mark O. Scates, Robin Suzanne Tanke, G. Paull Torrence, Richard F. Vogel, Jr., R. Jay Warner
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Patent number: 5371286Abstract: A method is provided to improve the quality of recycle of certain residues by modifying the separation of alkanes and alkane-like materials and carbonyl-containing impurities from the recycle during the manufacture of acetic acid by the carbonylation of methanol. The improvement comprises operating a prior art stripper column in a reflux manner and partitioning the residue therefrom by the addition of water. The method also reduces the volume of disposal of potentially valuable recyclable reactants.Type: GrantFiled: April 26, 1993Date of Patent: December 6, 1994Assignee: Hoechst Celanese CorporationInventors: George A. Blay, Madan Singh, Mark O. Scates, Wayne D. Picard