Patents by Inventor Meenakshisunderam Sivakumaran

Meenakshisunderam Sivakumaran 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).

  • Publication number: 20230053812
    Abstract: The invention relates to stable pharmaceutical formulation useful for the oral administration comprising a peptide or protein drug and a permeation enhancer. In particular, the invention relates to stabilized pharmaceutical formulations comprising GLP-1 receptor agonist such as Semaglutide and a permeation enhancer and its process for preparation.
    Type: Application
    Filed: July 27, 2022
    Publication date: February 23, 2023
    Inventors: Saravanan KANNUSAMY, Prabhakaran CHAKKIRALA, Raghavendra Bharat GUNDA, Nagaprasad VISHNUBHOTLA, Meenakshisunderam SIVAKUMARAN
  • Publication number: 20170128421
    Abstract: The present invention relates to stable premix formulations for parenteral use and packaging for such formulations. The present invention relates to use of a single layer or multilayer film bags comprising polypropylene for packing premixed injectable formulations which remain stable during the storage period. The present invention relates to use of a single layer or multilayer film bags comprising polypropylene for packing dexmedetomidine premixed formulations. Such stable premixed formulations packed into a single layer or multilayer film bags comprising polypropylene are highly advantageous since they are ready-to-use, for example, in perioperative care of a subject in need thereof for sedation.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 11, 2017
    Inventors: Siva Prasad Reddy Sura, Surya Kumari Padala, Vikas Chandel, Arvind Gannimitta, Jayant Karajgi, Meenakshisunderam Sivakumaran
  • Publication number: 20090124702
    Abstract: The present invention relates to an extended release dosage form of highly water-soluble antidiabetic drug metformin or its pharmaceutically acceptable salts. This invention also relates to methods for preparing the extended release dosage forms of metformin or its pharmaceutically acceptable salts.
    Type: Application
    Filed: January 24, 2006
    Publication date: May 14, 2009
    Inventors: Pechetti Siva Satya Krishna Babu, Kulkarni Amol, Gogia Ashish, Meenakshisunderam Sivakumaran
  • Patent number: 7164022
    Abstract: The present invention relates to an improved process for the preparation of pure Finasteride of Formula I, which comprises converting dihydrofinasteride to finasteride through novel protected dihydrofinasteride and protected finasteride intermediates.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: January 16, 2007
    Assignee: Aurobindo Pharma Ltd.
    Inventors: Ramesh Dandala, Divvela Venkata Naga Srinvasa Rao, Koilpillai Joseph Prabahar, Gollapalli Venkateswara Rao, Meenakshisunderam Sivakumaran
  • Patent number: 7126005
    Abstract: The present invention is directed to a new process of preparing highly pure Florfenicol. The invention is further directed to new oxazolidine derivatives useful in making Florfenicol and processes of making these derivatives. Examples of such intermediates include (4R,5R)-3-acetyl-2,2-dimethyl-4-hydroxymethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine; and (4S,5R)-3-acetyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: October 24, 2006
    Assignee: Aurobindo Pharma Limited
    Inventors: Vijay Kumar Handa, Arun Kumar Gupta, Meenakshisunderam Sivakumaran
  • Patent number: 7041826
    Abstract: The present invention describes an industrially advantageous process to prepare highly pure 1-Methyl-3-phenylpiperazine of Formula I that makes use of a novel piperazine derivative, 4-Benzyl-1-methyl-2-oxo-3-phenylpiperazine, represented by Formula II 1-Methyl-3-phenylpiperazine is a useful intermediate in the preparation of antidepressant Mirtazapine.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: May 9, 2006
    Assignee: Aurobindo Pharma Ltd.
    Inventors: Vijay Kumar Handa, Divvela Venkata Naga Srinivasa Rao, Meenakshisunderam Sivakumaran
  • Publication number: 20060084671
    Abstract: The present invention relates to an improved process for the preparation of pure Finasteride of Formula I, which comprises converting dihydrofinasteride to finasteride through novel protected dihydrofinasteride and protected finasteride intermediates.
    Type: Application
    Filed: October 18, 2005
    Publication date: April 20, 2006
    Inventors: Ramesh Dandala, Divvela Rao, Koilpillai Prabahar, Gollapalli Rao, Meenakshisunderam Sivakumaran
  • Publication number: 20050137182
    Abstract: The present invention relates to novel crystalline form of Cefdinir, 7?-[(Z)-2-(2-amino-4-thiazolyl)-2-hydroxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid, herein referred as cefdinir crystal B, processes for preparing cefdinir crystal B, and the incorporation of cefdinir crystal B in pharmaceutical compositions.
    Type: Application
    Filed: October 29, 2004
    Publication date: June 23, 2005
    Inventors: Ramesh Dandala, Meenakshisunderam Sivakumaran
  • Patent number: 6903232
    Abstract: This invention relates to a novel process to obtain highly pure 4-(cyclopropylcarbonyl)-?,?-dimethylphenylacetic acid of Formula I through crystallization from a mixture of para and meta regioisomers of Formula I and II in cyclohexane, whereby the amount of undesired meta isomer, 3-(cyclopropylcarbonyl)-?,?-dimethylphenylacetic acid of Formula II is decreased to below 0.5%. The compound of Formula I is a key intermediate for the preparation of high purity terfenadine carboxylate, which is a known antihistaminic.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: June 7, 2005
    Assignee: Aurobindo Pharma Ltd.
    Inventors: Ramesh Dandala, Umashankar Das, Divvela Venkata Naga Srinivasa Rao, Meenakshisunderam Sivakumaran
  • Publication number: 20050075506
    Abstract: The present invention is directed to a new process of preparing highly pure Florfenicol. The invention is further directed to new oxazolidine derivatives useful in making Florfenicol and processes of making these derivatives. Examples of such intermediates include (4R,5R)-3-acetyl-2,2-dimethyl-4-hydroxymethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine; and (4S,5R)-3-acetyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine.
    Type: Application
    Filed: December 16, 2003
    Publication date: April 7, 2005
    Inventors: Vijay Handa, Arun Gupta, Meenakshisunderam Sivakumaran
  • Publication number: 20050043531
    Abstract: A novel process is disclosed for the preparation of Cefepime, a cephalosporin antibiotic, using novel new intermediates of the general Formula, where X represents Bromine or Chlorine atom This process comprises the step of cyclizing the bromo or chloro intermediate with thiourea to produce Cefepime of high purity. A process to prepare bromo or chloro intermediate comprising the acylation of 7-Amino-3-[(1-methyl-1-pyrrolidinium) methyl]-3-cephem-4-carboxylate with 4-halo-2-methoxyimino-3-oxobutyric acid halide is also described.
    Type: Application
    Filed: October 17, 2003
    Publication date: February 24, 2005
    Inventors: Vijay Handa, Anand Kamat, Meenakshisunderam Sivakumaran
  • Publication number: 20040242879
    Abstract: The present invention describes an industrially advantageous process to prepare highly pure 1-Methyl-3-phenylpiperazine of Formula I 1
    Type: Application
    Filed: August 26, 2003
    Publication date: December 2, 2004
    Inventors: Vijay Kumar Handa, Divvela Venkata Naga Srinivasa Rao, Meenakshisunderam Sivakumaran
  • Publication number: 20040242670
    Abstract: Process for the preparation of amorphous form of Atorvastatin calcium of Formula I 1
    Type: Application
    Filed: June 1, 2004
    Publication date: December 2, 2004
    Inventors: Sonny Sebastian, Sitaramaiah Devarasetty, Ramesh Dandala, Meenakshisunderam Sivakumaran
  • Publication number: 20040242556
    Abstract: The present invention relates to novel crystalline form of Cefdinir, 7&bgr;-[(Z)-2-(2-amino-4-thiazolyl)-2-hydroxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid, herein called as cefdinir crystal B, process to prepare it and the use of cefdinir crystal B in pharmaceutical compositions.
    Type: Application
    Filed: February 24, 2004
    Publication date: December 2, 2004
    Inventors: Ramesh Dandala, Meenakshisunderam Sivakumaran
  • Patent number: 6825362
    Abstract: There is disclosed, a process for lactonization to produce highly pure simvastatin of Formula I which comprises lactonization of a compound of Formula II where Z is H or NH4 in a mixture of acetonitrile and glacial acetic acid under anhydrous conditions at a temperature of 65-70° C.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: November 30, 2004
    Assignee: Aurobindo Pharma Limited
    Inventors: Ramesh Dandala, Sonny Sebastian, Dandala Subramanyam, Meenakshisunderam Sivakumaran
  • Patent number: 6797831
    Abstract: There is disclosed a process for the manufacture of simvastatin of Formula I which comprises heating a compound, namely acid or ammonium salt of compound of Formula II, where Z is H or NH4 in an organic solvent at a temperature of 130-140° C.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: September 28, 2004
    Assignee: Aurobindo Pharma Limited
    Inventors: Ramesh Dandala, Sonny Sebastian, Sanapureddy Jagan Mohan Reddy, Meenakshisunderam Sivakumaran
  • Patent number: 6781003
    Abstract: The present invention relates to an industrially advantageous method for the purification of Citalopram (Formula I) wherein desmethyl citalopram (Formula II), present in crude Citalopram as an impurity, is methylated to produce pure Citalopram.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: August 24, 2004
    Assignee: Aurobindo Pharma Ltd.
    Inventors: Vipin Kumar Kaushik, Divvela Venkata Naga Srinivasa Rao, Vijay Kumar Handa, Meenakshisunderam Sivakumaran
  • Publication number: 20040077884
    Abstract: There is disclosed, a process for lactonization to produce highly pure simvastatin of Formula I 1
    Type: Application
    Filed: June 23, 2003
    Publication date: April 22, 2004
    Inventors: Ramesh Dandala, Sonny Sebastian, Dandala Subramanyam, Meenakshisunderam Sivakumaran
  • Publication number: 20040077900
    Abstract: This invention relates to a novel process to obtain highly pure 4-(cyclopropylcarbonyl) -&agr;, &agr;-dimethylphenylacetic acid of Formula I through crystallization from a mixture of para and meta regioisomers of Formula I and II in cyclohexane, whereby the amount of undesired meta isomer, 3-(cyclopropylcarbonyl)-&agr;,&agr;-dimethylphenylacetic acid of Formula 11 1
    Type: Application
    Filed: July 2, 2003
    Publication date: April 22, 2004
    Inventors: Ramesh Dandala, Umashankar Das, Divvela Venkata Naga Srinivasa Rao, Meenakshisunderam Sivakumaran
  • Publication number: 20040019225
    Abstract: There is disclosed a process for the manufacture of simvastatin of Formula I 1
    Type: Application
    Filed: May 19, 2003
    Publication date: January 29, 2004
    Inventors: Ramesh Dandala, Sonny Sebastian, Sanapureddy Jagan Mohan Reddy, Meenakshisunderam Sivakumaran