Patents by Inventor Gudipati Srinivasulu

Gudipati Srinivasulu 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 SEPARATION OF ENANTIOMERICALLY PURE COMPOUNDS
    Publication number: 20110230666
    Abstract: The present patent application relates to an improved process for the separation of enantiomerically pure compounds. Specifically it relates to separation of enantiomerically enriched Rivastigmine, Duloxetine, Escitalopram and their intermediates in high yields.
    Type: Application
    Filed: February 5, 2009
    Publication date: September 22, 2011
    Applicant: SHODHANA LABORATORIES LIMITED
    Inventors: Thota Giridhar, Gudipati Srinivasulu, Kotaru Srinivasa Rao
  • Preparation of Escitalopram, Its Salts and Intermediates
    Publication number: 20110092719
    Abstract: The present patent application relates to an improved process for the preparation of escitalopram, its salts and intermediates. It also relates to a novel crystalline form S of citalopram diol intermediate, process for preparation and its use in the preparation of citalopram, escitalopram and their salts.
    Type: Application
    Filed: May 28, 2009
    Publication date: April 21, 2011
    Applicant: SHODHANA LABORATORIES LIMITED
    Inventors: Thota Giridhar, Gudipati Srinivasulu, Kotaru Srinivasa Rao
  • Forms of dutasteride and methods for preparation thereof
    Patent number: 7022854
    Abstract: A crystalline Form II of 17?-N-[2,5-bis (trifluoromethyl)phenyl]carbamoyl-4-aza-5-?-androst-1-en-3-one (dutasteride) is provided. The preferred crystalline Form II of dutasteride has an X-ray powder diffraction pattern, expressed in terms of d-spacing (in ° A), with peaks at about 13.42, 6.96, 6.13, 5.27, 4.77, 4.70, 4.58, 4.46 and 3.82. A process for preparation of a crystalline Form II of dutasteride is also provided and includes dissolving a crude form of dutasteride in an alcoholic solvent having from 1 to 5 carbon atoms; removing the alcoholic solvent to obtain a residue; adding an ester solvent to the residue; and filtering the resulting separated solids. The processes of the invention are believed to be simple, eco-friendly, and commercially viable.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: April 4, 2006
    Assignees: Dr. Reddy's Laboratories, Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Manne Satyanarayana Reddy, Chakilam Nagaraju, Gudipati Srinivasulu, Mandava Venkata Naga Brahmeshwar Rao, Bojja Ramachandra Reddy, Singamsetty Radhakrishna
  • Process for the preparation of 17beta-N-[2,5-bis(trifluoromethyl)phenyl] carbamoyl-4-aza-5-alpha-androst-1-en-3-one
    Publication number: 20050059692
    Abstract: The present invention relates to a process for the preparation of Dutasteride, which is chemically known as 17?-N-[2,5-bis (trifluoromethyl) phenyl] carbamoyl-4-aza-5-?-androst-1-en-3-one and can be represented by Formula (I).
    Type: Application
    Filed: July 6, 2004
    Publication date: March 17, 2005
    Inventors: Manne Reddy, Gudipati Srinivasulu, Katkam Srinivas, Komati Satyanarayana, Mayur Khunt
  • Amorphous form of rosiglitazone maleate and process for preparation thereof
    Publication number: 20040242658
    Abstract: An amorphous rosiglitazone maleate and its preparation as well as uses thereof for a pharmaceutical composition and a method for medical treatment including combination therapy are described.
    Type: Application
    Filed: January 7, 2004
    Publication date: December 2, 2004
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Gudipati Srinivasulu, Mandava Venkata Naga Brahmeshwar Rao, Banda Goverdhan Reddy
  • Forms of dutasteride and methods for preparation thereof
    Publication number: 20040077673
    Abstract: A crystalline Form II of 17&bgr;-N-[2,5-bis (trifluoromethyl)phenyl]carbamoyl-4-aza-5-&agr;-androst-1-en-3-one (dutasteride) is provided. The preferred crystalline Form II of dutasteride has an X-ray powder diffraction pattern, expressed in terms of d-spacing (in ° A), with peaks at about 13.42, 6.96, 6.13, 5.27, 4.77, 4.70, 4.58, 4.46 and 3.82. A process for preparation of a crystalline Form II of dutasteride is also provided and includes dissolving a crude form of dutasteride in an alcoholic solvent having from 1 to 5 carbon atoms; removing the alcoholic solvent to obtain a residue; adding an ester solvent to the residue; and filtering the resulting separated solids. The processes of the invention are believed to be simple, eco-friendly, and commercially viable.
    Type: Application
    Filed: July 17, 2003
    Publication date: April 22, 2004
    Applicants: DR. REDDY'S LABORATORIES LIMITED, DR. REDDY'S LABORATORIES, INC.
    Inventors: Manne Satyanarayana Reddy, Chakilam Nagaraju, Gudipati Srinivasulu, Mandava Venkata Naga Brahmeshwar Rao, Bojja Ramachandra Reddy