Patents by Inventor Krishnarao Sirsath

Krishnarao Sirsath 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 preparation of 7-[a-amino (4-hydroxyphenyl) acetamido]-3-substituted-3-cephem-4-carboxylic acid
    Publication number: 20060149096
    Abstract: A process for preparation of 7-[D-?-amino-?-(4-hydroxyphenyl)acetamido]-3-(1-propen-1-yl)-3-cepham-4-carboxylic acid viz. Cefprozil of formula (I) igh purity, substantially free of impurities, which comprises preparation of mixed acid anhydride by selecting the sequence and temperature of addition of the reagents and its subsequent condensation with a protected 7-APCA; followed by hydrolysis, isolation and purification to give Cefprozil of formula (I) in the form of a monohydrate.
    Type: Application
    Filed: February 23, 2006
    Publication date: July 6, 2006
    Applicant: Lupin Ltd.
    Inventors: Om Tyagi, Dnyandev Rane, Tushar Srivastava, Krishnarao Sirsath
  • Process for preparation of 7-[alpha-amino (4-hydroxyphenyl) acetamido]-3-substituted-3-cephem-4-carboxylic acid
    Publication number: 20050113570
    Abstract: A process for preparation of 7-[D-?-amino-?-(4-hydroxyphenyl)acetamido]-3-(1-propen-1-yl)-3-cephem-4-carboxylic acid viz. Cefprozil of formula (I) igh purity, substantially free of impurities, which comprises preparation of mixed acid anhydride by selecting the sequence and temperature of addition of the reagents and its subsequent condensation with a protected 7-APCA; followed by hydrolysis, isolation and purification to give Cefprozil of formula (I) in the form of a monohydrate.
    Type: Application
    Filed: March 15, 2004
    Publication date: May 26, 2005
    Applicant: LUPIN LTD.
    Inventors: Om Tyagi, Dnyandev Rane, Tushar Srivastava, Krishnarao Sirsath