Patents by Inventor Sreenadhacharyulu Kandala

Sreenadhacharyulu Kandala 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).

  • Eszopiclone process
    Patent number: 8058438
    Abstract: Eszopiclone is prepared by reacting zopiclone with an enatiomerically pure di-p-toluoyl tartaric acid, recovering a solid salt, and reacting a solid salt with a base. Zopiclone is prepared by reacting 6-(5-chloropyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]-pyrazine with 1-chlorocarbonyl-4-methylpiperazine hydrochloride.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: November 15, 2011
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.,
    Inventors: Venkata Naga Brahmeswara Rao Mandava, Sreenadhacharyulu Kandala, Mukunda Reddy Jambula, Raveendra Reddy Chinta
  • ESZOPICLONE PROCESS
    Publication number: 20090099359
    Abstract: Eszopiclone is prepared by reacting zopiclone with an enatiomerically pure di-p-toluoyl tartaric acid, recovering a solid salt, and reacting a solid salt with a base. Zopiclone is prepared by reacting 6-(5-chloropyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]-pyrazine with 1-chlorocarbonyl-4-methylpiperazine hydrochloride.
    Type: Application
    Filed: December 19, 2008
    Publication date: April 16, 2009
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Venkata Naga Brahmeswara Rao Mandava, Sreenadhacharyulu Kandala, Mukunda Reddy Jambula, Raveendra Reddy Chinta
  • Eszopiclone process
    Patent number: 7476737
    Abstract: Eszopiclone is prepared by reacting zopiclone with an enatiomerically pure di-p-toluoyl tartaric acid, recovering a solid salt, and reacting a solid salt with a base. Zopiclone is prepared by reacting 6-(5-chloropyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]-pyrazine with 1-chlorocarbonyl-4-methylpiperazine hydrochloride.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: January 13, 2009
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Venkata Naga Brahmeswara Rao Mandava, Sreenadhacharyulu Kandala, Mukunda Reddy Jambula, Raveendra Reddy Chinta
  • NON-BENZODIAZEPINE HYPNOTIC COMPOSITIONS
    Publication number: 20070098788
    Abstract: Pharmaceutical compositions comprising non-benzodiazepine hypnotic drugs or their pharmaceutically acceptable salts, solvates, enantiomers or mixtures and processes for preparing the same. The invention also includes immediate release and extended release pharmaceutical compositions comprising non-benzodiazepine hypnotic drugs, useful for sleep induction and sleep maintenance.
    Type: Application
    Filed: October 26, 2006
    Publication date: May 3, 2007
    Inventors: Subhash Gore, Sudeep Agrawal, Abhijeet Upadhye, Srinivasulu Rangineni, Sivakumar Bommareddy, Srinivas Gade, Basappa Nagaraj, Gautam Bakshi, Surjit Das, Satish Jain, Surya Devarakonda, Bharath Deevireddy, Eswaraiah Sajja, Venkata Naga Kali Veturi, Sreenadhacharyulu Kandala, Gurvinder Singh, Indu Bhushan, Mailatur Mohan
  • ESZOPICLONE PROCESS
    Publication number: 20070054914
    Abstract: Eszopiclone is prepared by reacting zopiclone with an enatiomerically pure di-p-toluoyl tartaric acid, recovering a solid salt, and reacting a solid salt with a base. Zopiclone is prepared by reacting 6-(5-chloropyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]-pyrazine with 1-chlorocarbonyl-4-methylpiperazine hydrochloride.
    Type: Application
    Filed: September 5, 2006
    Publication date: March 8, 2007
    Inventors: Venkata Naga Brahmeswara Mandava, Sreenadhacharyulu Kandala, Mukunda Jambula, Raveendra Chinta