Patents by Inventor Nileshkumar Sureshbhai Patel

Nileshkumar Sureshbhai Patel 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 morphinane analogues
    Patent number: 8710226
    Abstract: The present invention relates to an improved process for preparing morphinane analogues of formula 1 wherein the substituents R1, R2, R2a, R3, R4, R5 and Y have the meanings as defined in the specifications.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: April 29, 2014
    Assignee: Sun Pharmaceutical Industries Limited
    Inventors: Nileshkumar Sureshbhai Patel, Srinivasu Kilaru, Rajamannar Thennati
  • PROCESS FOR THE PREPARATION OF MORPHINANE ANALOGUES
    Publication number: 20140031550
    Abstract: The present invention relates to an improved process for preparing morphinane analogues of formula 1 wherein the substituents R1, R2, R2a, R3, R4, R5 and Y have the meanings as defined in the specifications.
    Type: Application
    Filed: August 29, 2013
    Publication date: January 30, 2014
    Applicant: Sun Pharmaceutical Industries Ltd.
    Inventors: Nileshkumar Sureshbhai PATEL, Srinivasu KILARU, Rajamannar THENNATI
  • Process for the preparation of morphinane analogues
    Patent number: 8546572
    Abstract: The present invention relates to an improved process for preparing morphinane analogues of formula (1) wherein the substituents R1, R2, R3, R4, R5 and Y have the same meanings as defined in the specification.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: October 1, 2013
    Assignee: Sun Pharmaceutical Industries Limited
    Inventors: Nileshkumar Sureshbhai Patel, Srinivasu Kilaru, Rajamannar Thennati
  • PROCESS FOR THE PREPARATION OF MORPHINE ANALOGUES
    Publication number: 20110152527
    Abstract: The present invention relates to an improved process for preparing morphinane analogues of formula (1) wherein the substituents R1, R2, R2a, R3, R4, R5 and Y have the meanings as defined in the specifications.
    Type: Application
    Filed: March 23, 2009
    Publication date: June 23, 2011
    Inventors: Nileshkumar Sureshbhai Patel, Srinivasu Kilaru, Rajamannar Thennati
  • Stable polymorphic forms of an anticonvulsant
    Patent number: 7667042
    Abstract: Stable polymorphic forms III, IV and substantially amorphous form of an anticonvulsant, tiagabine hydrochloride.
    Type: Grant
    Filed: December 24, 2004
    Date of Patent: February 23, 2010
    Assignee: Sun Pharma Advanced Research Company Ltd.
    Inventors: Muthukumaran Natarajan, Nileshkumar Sureshbhai Patel, Mehul Chandrakatbhai Bhatt, Srinivasu Kilaru, Rajamannar Thennati
  • Process for the preparation of 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofuran carbonitrile
    Patent number: 7148364
    Abstract: The present invention provides a process for the preparation of crude 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofuran carbonitrile base with substantially low levels of impurities by arresting the formation of substantial amount of carboxamide impurity, high molecular weight impurities and suppressing the formation of desmethylcitalopram besides taking the cyanide exchange reaction to near completion and thus avoiding an extensive and expensive purification process.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: December 12, 2006
    Assignee: Sun Pharmaceutical Industries
    Inventors: Thennati Rajamannar, Kilaru Srinivasu, Nileshkumar Sureshbhai Patel, Chinnapillai Rajendran
  • Process for hydrogenolysis of [1-(3-dimethylamino)propyl)]-1-(4-fluorophenyl)-1,3-dihydro-5-halo-isobenzofuran acetamido-3-substituted-3-cephem-4-carboxylic acid
    Patent number: 7019153
    Abstract: The present invention provides a process for decreasing the content of [1-(3-dimethylamino)propyl)]-1-(4-fluorophenyl)-1,3-dihydro-5-halo-isobenzofuran, a compound of formula 1, wherein X is halogen, by converting to a compound of formula 3, comprising subjecting [1-(3-dimethylamino)propyl)]-1-(4-fluorophenyl)-1,3-dihydro-5-halo-isobenzofuran present as impurity in crude 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofuran carbonitrile to hydrogenolysis.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: March 28, 2006
    Assignee: Sun Pharmaceutical Industries Limited
    Inventors: Ashok Punju Borase, Nileshkumar Sureshbhai Patel, Srinivasu Kilaru, Rajamannar Thennati