Patents by Inventor Purna Ray

Purna Ray 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 ganciclovir
    Publication number: 20060142574
    Abstract: The present invention relates to a process for the preparation of N2-Acetyl-9-(1,3-diace-toxy-2-propoxymethyl) guanine, referred to here as N-9 alkylated isomer of structural formula I, and to the use of this compound as an intermediate for the preparation of antiviral compound, ganciclovir.
    Type: Application
    Filed: October 31, 2003
    Publication date: June 29, 2006
    Inventors: Jayachandra Babu, Purna Ray, Chandra Khanduri, Yatendra Kumar
  • Process for the preparation of repaglinide
    Publication number: 20050107614
    Abstract: The present invention relates to a cost effective and industrially advantageous process for the preparation of repaglinide.
    Type: Application
    Filed: September 24, 2002
    Publication date: May 19, 2005
    Inventors: Purna Ray, Jayachandra Babu, Mohammad Salman
  • Process for the preparation of beta-ionylideneacetaldehyde
    Publication number: 20050027143
    Abstract: The present invention relates to an industrially advantageous process for the preparation of beta-ionylidencacetaldehyde of structural Formula I, which is a key intermediate for the synthesis of vitamin A and related compounds such as tretinoin and isotretinoin.
    Type: Application
    Filed: August 23, 2002
    Publication date: February 3, 2005
    Inventors: Mohammad Salman, Purna Ray, Suresh Babu, Naresh Kumar