Patents by Inventor Pulla R. Singam

Pulla R. Singam 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 reduction of (2R)-4-oxoazetidinone-2-carboxylic acid
    Patent number: 6103911
    Abstract: The present invention relates to a process for the reduction of an azetidinone-carboxylic acid to an azetidine-alcohol.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: August 15, 2000
    Assignee: Abbott Laboratories
    Inventors: James E. Resek, Shyamal I. Parekh, Pulla R. Singam, Hemant H. Patel, Michael H. Cain, Bikshandarkoil A. Narayanan
  • Method of preparing enantiomerically-pure 3-methyl-5-(1-alkyl-2(S)-pyrrolidinyl) isoxazoles
    Patent number: 5424444
    Abstract: A novel process for preparing enantiomerically-pure 3-methyl-5-(1-(C.sub.1 -C.sub.3 -alkyl)-2-pyrrolidinyl)isoxazole in high yield, wherein a protected pyrrolidine or 2-oxo-pyrrolidine starting material is reacted with a suitable organic anion and a resulting beta-keto oxime intermediate is cyclized and dehydrated, as well as intermediates useful in the preparation thereof.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: June 13, 1995
    Assignee: Abbott Laboratories
    Inventors: Nan-Horng Lin, Yun He, Richard L. Elliott, Mukund S. Chorghade, Thomas K. J. Esch, Dieter O. Beer, Christian C. Witzig, Thomas C. Herzig, Steven J. Wittenberger, William H. Bunnelle, Bikshandar A. Narayanan, Pulla R. Singam, Alla V. Rama Rao