Patents by Inventor Kundan Singh Shekhawat

Kundan Singh Shekhawat 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).

  • Process for the preparation of 2-(trihalomethyl) benzamide
    Patent number: 10167250
    Abstract: The present invention relates to a process for preparation of 2-(trihalomethyl) benzamide.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: January 1, 2019
    Assignee: SRF Limited
    Inventors: Surender Dhingra, Kundan Singh Shekhawat, Satish Kumar, Kapil Kumar, Rajdeep Anand
  • PROCESS FOR THE PREPARATION OF 2-(TRIHALOMETHYL) BENZAMIDE
    Publication number: 20170129849
    Abstract: The present invention relates to a process for preparation of 2-(trihalomethyl) benzamide.
    Type: Application
    Filed: June 16, 2015
    Publication date: May 11, 2017
    Inventors: Surender DHINGRA, Kundan Singh SHEKHAWAT, Satish KUMAR, Kapil KUMAR, Rajdeep Anand
  • Process for preparing quinoline-3-carboxamide derivatives
    Patent number: 9006443
    Abstract: Disclosed herein is an improved, commercially viable and industrially advantageous process for the preparation of quinoline-3-carboxamide derivatives such as laquinimod, or a pharmaceutically acceptable salt thereof, in high yield and purity.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: April 14, 2015
    Assignee: Actavis Group PTC ehf
    Inventors: Girish Dixit, Krishnadatt Sharma, Kundan Singh Shekhawat, Nitin Sharadchandra Pradhan, Jon Valgeirsson
  • Process for Preparing Quinoline-3-Carboxamide Derivatives
    Publication number: 20140005401
    Abstract: Disclosed herein is an improved, commercially viable and industrially advantageous process for the preparation of quinoline-3-carboxamide derivatives such as laquinimod, or a pharmaceutically acceptable salt thereof, in high yield and purity.
    Type: Application
    Filed: September 9, 2013
    Publication date: January 2, 2014
    Applicant: ACTAVIS GROUP PTC EHF
    Inventors: Girish Dixit, Krishnadatt Sharma, Kundan Singh Shekhawat, Nitin Sharadchandra Pradhan, Jon Valgeirsson
  • Process for preparing quinoline-3-carboxamide derivatives
    Patent number: 8552194
    Abstract: Disclosed herein is an improved, commercially viable and industrially advantageous process for the preparation of quinoline-3-carboxamide derivatives such as laquinimod, or a pharmaceutically acceptable salt thereof, in high yield and purity.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: October 8, 2013
    Assignee: Actavis Group PTC EHF
    Inventors: Girish Dixit, Krishnadatt Sharma, Kundan Singh Shekhawat, Nitin Sharadchandra Pradhan, Jon Valgeirsson
  • Process for preparing varenicline, varenicline intermediates, pharmaceutically acceptable salts thereof
    Patent number: 8314235
    Abstract: Provided herein is an improved, convenient, commercially viable and environmentally friendly process for the preparation of varenicline or a pharmaceutically acceptable salt thereof comprising reacting 1-(4,5-diamino-10-aza-tricyclo[6.3.1.02 7]dodeca-2(7),3,5-trien-10-yl)-2,2,2-trifluoro-ethanone with chloroacetaldehyde in the presence of an oxygen source. Provided further herein is an improved and industrially advantageous process for the preparation of 1-(4,5-diamino-10-aza-tricyclo[6.3.1.02 7]dodeca-2(7),3,5-trien-10-yl)-2,2,2-trifluoro-ethanone.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: November 20, 2012
    Assignee: Actavis Group PTC EHF
    Inventors: Girish Dixit, Krishnadatt Sharma, Kundan Singh Shekhawat, Nitin Sharadchandra Pradhan
  • Process for Preparing Substantially Pure Simvastatin
    Publication number: 20110282074
    Abstract: This invention relates to an improved process for preparing substantially pure simvastatin (I), chemically known as (1S,3R,7S,8S,8aR)-8-[2-[(2R,4R)-4-hydroxy-6-oxotetrahydro-2-H-pyran-2-yl]ethyl]-3 ,7-dimeth-yl-1,2,3,7,8,8a-Hexahydronaphthalen-1-yl2,2-dimethyl butanoate, which comprises of: a) treating lovastatin (II) with an alkali metal hydroxide in a chosen suitable alcoholic solvent followed by relactonization to obtain the diol lactone intermediate (III) in a single vessel. b) selective silylation of 4-hydroxy group of diol lactone intermediate (III) with a chosen suitable silylating reagent to obtain mono silylated intermediate diol lactone (IV).
    Type: Application
    Filed: July 8, 2010
    Publication date: November 17, 2011
    Applicant: Sterling Biotech Research Center a Corporate Research Centre of Sterling Biotech Limited
    Inventors: Sugata Chatterjee, Ajay Singh Rawat, Neeraj Kumar, Jetti Rajanikanth, Kundan Singh Shekhawat, Jigar H. Shah, P. Venkateswarlu
  • PROCESS FOR PREPARING VARENICLINE, VARENICLINE INTERMEDIATES, AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF
    Publication number: 20110224437
    Abstract: Provided herein is an improved, convenient, commercially viable and environmentally friendly process for the preparation of varenicline or a pharmaceutically acceptable salt thereof comprising reacting 1-(4,5-diamino-10-aza-tricyclo[6.3.1.02.7]dodeca-2(7),3,5-trien-10-yl)-2,2,2-trifluoro-ethanone with chloroacetaldehyde in the presence of an oxygen source. Provided further herein is an improved and industrially advantageous process for the preparation of 1-(4,5-diamino-10-aza-tricyclo[6.3.1.02.7]dodeca-2(7),3,5-trien-10-yl)-2,2,2-trifluoro-ethanone.
    Type: Application
    Filed: August 31, 2009
    Publication date: September 15, 2011
    Applicant: ACTAVIS GROUP PTC EHF
    Inventors: Girish Dixit, Krishnadatt Sharma, Kundan Singh Shekhawat, Nitin Sharadchandra Pradhan
  • Process for Preparing Quinoline-3-Carboxamide Derivatives
    Publication number: 20110105756
    Abstract: Disclosed herein is an improved, commercially viable and industrially advantageous process for the preparation of quinoline-3-carboxamide derivatives such as laquinimod, or a pharmaceutically acceptable salt thereof, in high yield and purity.
    Type: Application
    Filed: April 27, 2009
    Publication date: May 5, 2011
    Applicant: ACTAVIS GROUP PTC EHF
    Inventors: Girish Dixit, Krishnadatt Sharma, Kundan Singh Shekhawat, Nitin Sharadchandra Pradhan, Jon Valgeirsson