Patents by Inventor Amit Tewari

Amit Tewari 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).

  • Publication number: 20200172560
    Abstract: The present invention relates to a process for the preparation of crisaborole, the process comprising reacting a compound of formula IIa with a compound of formula III to give a compound of formula IV and converting the compound of formula IV to crisaborole. The present invention also relates to a process for the preparation of crystalline crisaborole.
    Type: Application
    Filed: May 31, 2018
    Publication date: June 4, 2020
    Inventors: Shekhar Bhaskar Bhirud, Samir Naik, Amit Tewari, Yogesh Baburao Kajale, Mahendra Jorna Choraghe, Sanjay Sakharam Pawar
  • Patent number: 6965904
    Abstract: A method and computer program product for locating data in a system including a plurality of archive units, and answering a query directed to an archive unit. Locating includes broadcasting a query to all the archive units; identifying a set of the archive units that could contain a result for the query; receiving at least one query reply from the archive units; and validating the query reply when the archive unit that sent the query reply is in the set. Answering includes receiving the query; responding to the query when the archive unit could contain a result for the query; and discarding the query without responding when the archive unit could not contain a result for the query.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: November 15, 2005
    Assignee: Zantaz, Inc.
    Inventors: William E. Bankert, Jean-Luc Chatelain, Philippe Ciampossin, Eric Rodriguez, David Lee Smith, Amit Tewari
  • Patent number: 6750356
    Abstract: The present invention provides a method for the preparation of arteether from artemisinin in one pot in just about 4 hours comprising reduction of artemisinin into dihydroartemisinin by less quantity of sodium borohydride in ethanol at room temperature in the presence of a novel polyhydroxy catalyst, acylation of dihydroartemisinin in the presence of an acid catalyst, extraction of arteether from an aqueous reaction mixture using 1% ethyl acetate in n-hexane followed by workup and purification of the impure arteether to yield 80-86% (w/w) pure alpha, beta arteether.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: June 15, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Rajendra Singh Bhakuni, Amit Tewari, Tarun Singh, Suman P. S. Khanuja
  • Publication number: 20040106809
    Abstract: The present invention provides a method for the preparation of arteether from artemisinin in one pot in just about 4 hours comprising reduction of artemisinin into dihydroartemisinin by less quantity of sodium borohydride in ethanol at room temperature in the presence of a novel polyhydroxy catalyst, acylation of dihydroartemisinin in the presence of an acid catalyst, extraction of arteether from an aqueous reaction mixture using 1% ethyl acetate in n-hexane followed by workup and purification of the impure arteether to yield 80-86% (w/w) pure alpha, beta arteether.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 3, 2004
    Inventors: Rajendra Singh Bhakuni, Amit Tewari, Tarun Singh, Suman P.S. Khanuja
  • Patent number: 6683193
    Abstract: The present invention relates to an improved method for the preparation of Artemether. Artemether prepared from the process is useful for the treatment of uncomplicated, severe complicated and multi drug resistant malaria.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: January 27, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Rajendra Singh Bhakuni, Tarun Singh, Atul Prakash Kahol, Amit Tewari, Sundeep Tandon, Suman Preet Singh Khanuja
  • Publication number: 20030181513
    Abstract: The present invention relates to an improved method for the preparation of Artemether. Artemether prepared from the process is useful for the treatment of uncomplicated, severe complicated and multi drug resistant malaria.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Rajendra Singh Bhakuni, Tarun Singh, Atul Prakash Kahol, Amit Tewari, Sudeep Tandon, Suman Preet Singh Khanuja
  • Publication number: 20020123999
    Abstract: A method and computer program product for locating data in a system including a plurality of archive units, and answering a query directed to an archive unit. Locating includes broadcasting a query to all the archive units; identifying a set of the archive units that could contain a result for the query; receiving at least one query reply from the archive units; and validating the query reply when the archive unit that sent the query reply is in the set. Answering includes receiving the query; responding to the query when the archive unit could contain a result for the query; and discarding the query without responding when the archive unit could not contain a result for the query.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 5, 2002
    Inventors: William E. Bankert, Jean-Luc Chatelain, Philippe Ciampossin, Eric Rodriguez, David Lee Smith, Amit Tewari
  • Patent number: 6337095
    Abstract: The invention relates to a process for the isolation of compound scopoletin which is used as nitric oxide synthesis inhibitor from Artemisia annua and other plant families, said process comprising extraction of dried powdered material of different plant parts with an aqueous acetonitrite solvent in the ratio of 1:5 for 6 to 8 hrs., concentration of the extracted solvent upto 30% of its original extract under vacuum, partitioning the concentrated extract with halogenated solvent to transfer scopoletin in the non-polar halogenated solvent, drying halogenated solvent over anhydrous sodium sulphate and evaporating the solvent, crystallizing the residues in methanol and filtering the crystals, concentrating the filtrate and chromatographed on silica gel, eluting scopoletin in chloroform methanol mixture; and crystallization of the fractions containing the scopoletin to get the pure scopoletin compound.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: January 8, 2002
    Assignee: Council of Scientific and Industrial Research
    Inventors: Dharam Chand Jain, Neerja Pant, Madan Mohan Gupta, Rajendra Singh Bhakuni, Ram Kishor Verma, Sudeep Tandon, Shiv Kumar Gupta, Amit Tewari, Atul Prakash Kahol, Sushil Kumar