Patents by Inventor Chandra Has Khanduri

Chandra Has Khanduri 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 EFAVIRENZ
    Publication number: 20110071287
    Abstract: The present invention relates to a process for the preparation of Efavirenz (Formula I), wherein triphosgene is used as a cyclizing agent.
    Type: Application
    Filed: May 1, 2009
    Publication date: March 24, 2011
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Mukesh Kumar Madhra, Pankaj Kumar Singh, Mukesh Sharma, Chandra Has Khanduri
  • PROCESS FOR THE PREPARATION ENANTIOMERICALLY PURE SALTS OF N-METHYL-3-(1-NAPHTHALENEOXY)-3-(2-THIENYL)PROPANAMINE
    Publication number: 20100280093
    Abstract: The present invention relates to duloxetine salts having enantiomeric purity of 98% or more and a process for such salts.
    Type: Application
    Filed: July 3, 2007
    Publication date: November 4, 2010
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Sujoy Biswas, Keya Karanjai, Chandra Has Khanduri
  • PROCESS FOR THE PREPARATION OF FORM I AND FORM II OF RITONAVIR
    Publication number: 20100099885
    Abstract: The present invention relates to processes for the preparation of Form I and Form II of Ritonavir, wherein no seed crystals are used.
    Type: Application
    Filed: October 1, 2007
    Publication date: April 22, 2010
    Inventors: Mukesh Kumar Sharma, Chandra Has Khanduri, Pankaj Kumar Singh, Yoginder Pal Sachdeva
  • PROCESS FOR THE PREPARATION OF CLOPIDOGREL AND ITS PHARMACEUTICALLY ACCEPTABLE SALTS
    Publication number: 20100016594
    Abstract: The present invention provides a process for the preparation of clopidogrel and its pharmaceutically acceptable salts thereof comprises the resolving racemic methyl alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorophenyl)-acetate by the salt formation of methyl alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorophenyl)-acetate with excess levorotatory camphor-10-sulfonic acid to get a maximum yield of camphor sulphonate salt of methyl S-(+)-alpha-5-(4,5,6,7-tetrahydro[3,2-e]thienopyridyl)(2-chlorophenyl)-acetate and transforming the camphor sulphonate salt to clopidogrel or its pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: September 4, 2007
    Publication date: January 21, 2010
    Inventors: Parendu Dhirajlal Rathod, Satish Kumar Aryan, Ram Chander Aryan, Chandra Has Khanduri
  • STABLE AMORPHOUS FEXOFENADINE HYDROCHLORIDE
    Publication number: 20090306135
    Abstract: The present invention relates to stable amorphous form of fexofenadine hydrochloride, process for its preparation, pharmaceutical composition comprising it and its use for the treatment of allergic reactions.
    Type: Application
    Filed: March 24, 2009
    Publication date: December 10, 2009
    Inventors: Mukesh Kumar SHARMA, Chandra Has KHANDURI, Bhupendra VASHISHTA
  • INTERMEDIATE COMPOUNDS AND THEIR USE IN PREPARATION OF LACOSAMIDE
    Publication number: 20090143472
    Abstract: The present invention is concerned with novel compounds and their use for the preparation of lacosamide. The present invention also contemplates processes for the preparation of lacosamide employing the novel compound of general Formula II, Formula IIa or Formula IIb as intermediate. Wherein R1 is —OH or —OMe; R2 is —OH or —NH—CH2—C6H5.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 4, 2009
    Inventors: Mukesh Kumar Madhra, Pankaj Kumar Singh, Chandra Has Khanduri
  • Process for the synthesis of ganciclovir
    Patent number: 7078524
    Abstract: The present invention relates to an industrial useful process for the synthesis of antiviral compound, ganciclovir which comprises dissolving a mixture containing N-7 and N-9 isomers of structural formulae, II and III, respectively: in a solvent or a mixture of solvents; separating the N-7 and N-9 isomers; and hydrolizing the N-9 isomer to obtain ganciclovir.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: July 18, 2006
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Jayachandra Suresh Babu, Purna Chandra Ray, Yatendra Kumar, Chandra Has Khanduri
  • Process for the synthesis of ganciclovir
    Publication number: 20040102628
    Abstract: The present invention relates to an industrial useful process for the synthesis of antiviral compound, ganciclovir.
    Type: Application
    Filed: November 22, 2002
    Publication date: May 27, 2004
    Inventors: Jayachandra Suresh Babu, Purna Chandra Ray, Yatendra Kumar, Chandra Has Khanduri