Patents by Inventor Prashanta Kumar Das

Prashanta Kumar Das 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 isolation of oryzanols from crude dark acid oil (rice bran)
    Patent number: 5869708
    Abstract: A process for the isolation of oryzanols from crude dark acid oil (rice bran) which comprises (a) distilling the free fatty acids from crude dark acid oil by conventional methods, (b) hydrolyzing the resultant residue by conventional methods, (c) dissolving the hydrolyzed product in water to form oryzanol containing micellar aggregates and adding dropwise aqueous solution of calcium chloride to form precipitate, (d) extracting the oryzanols from dried precipitate with polar organic solvent and if desired (e) purifying the oryzanols from the organic extract by column chromatography.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: February 9, 1999
    Inventors: Prashanta Kumar Das, Arabinda Chaudhuri, Thengumpillil Narayana Balagopala Kaimal, Uday Triambakaraj Bhalerao