Patents by Inventor Velladurai Hero

Velladurai Hero 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 cephalosporin antibiotic
    Patent number: 7339055
    Abstract: A process for the preparation of cephalosporin antibiotic of the formula (I) which comprises: (i) activating the compound of formula (III) as acid halide in an organic solvent (ii) treating the reaction mass obtained from step (i) with water (iii) separating the organic layer containing the reactive derivative of formula (III) and condensing it with 7-amino cephalosporin derivative by maintaining the pH in the range 5.0-10.0 using an inorganic base of the formula (XV), and iv) cyclizing the compound of formula (XVI) with thiourea in the presence of solvent and salt of organic or inorganic acid at a temperature in the range of ?50 to +50° C. to produce compound of formula (I).
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: March 4, 2008
    Assignee: Orchid Chemicals & Pharmaceuticals Ltd.
    Inventors: Pandurang Balwant Deshpande, Udayampalayam Palanisamy Senthilkumar, Velladurai Hero
  • Process for the preparation of cephalosporin antibiotic
    Publication number: 20050080070
    Abstract: A process for the preparation of cephalosporin antibiotic of the formula (I) which comprises: (i) activating the compound of formula (III) as acid halide in an organic solvent (ii) treating the reaction mass obtained from step (i) with water (iii) separating the organic layer containing the reactive derivative of formula (III) and condensing it with 7-amino cephalosporin derivative by maintaining the pH in the range 5.0-10.0 using an inorganic base of the formula (XV), and iv) cyclizing the compound of formula (XVI) with thiourea in the presence of solvent and salt of organic or inorganic acid at a temperature in the range of ?50 to +50° C. to produce compound of formula (I).
    Type: Application
    Filed: August 23, 2004
    Publication date: April 14, 2005
    Applicant: ORCHID CHEMICALS & PHARMACEUTICALS LTD.
    Inventors: Pandurang Deshpande, Udayampalayam Senthilkumar, Velladurai Hero