Patents by Inventor Das Retna Sobankumar

Das Retna Sobankumar 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 high purity phytosterols
    Patent number: 7632530
    Abstract: The present invention provides an isolation process of the pure sterols from the SODD by simple acid catalyzed esterification and the separation of the reagents by distillation and water washing followed by the crystallization of phytosterols and purification. Soybean oil deodorizer distillate (SODD) and distillate from other vegetable oil refining contain free sterols, in addition to steryl esters, tocopherols squalene and unknown compounds. The process is also applicable to other vegetable oil distillate containing more than 1% phytosterols in the free form. Phytosterols thus obtained is of high purity (95-99%) and high yield (80-90%) and contains ?-sitosterol, Stigmasterol and campesterol.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: December 15, 2009
    Assignee: Council of Scientific and Industrial Research
    Inventors: Chami Arumughan, Das Retna Sobankumar, Andikkannu Sudaresan, Sreeja Sadasivan Nair, Kannan Yohesh, Leelavathy Rajam